/*
 * canvg.js - Javascript SVG parser and renderer on Canvas
 * MIT Licensed
 * Gabe Lerner (gabelerner@gmail.com)
 * http://code.google.com/p/canvg/
 *
 * Requires: rgbcolor.js - http://www.phpied.com/rgb-color-parser-in-javascript/
 */
;(function () {
  // canvg(target, s)
  // empty parameters: replace all 'svg' elements on page with 'canvas' elements
  // target: canvas element or the id of a canvas element
  // s: svg string, url to svg file, or xml document
  // opts: optional hash of options
  //		 ignoreMouse: true => ignore mouse events
  //		 ignoreAnimation: true => ignore animations
  //		 ignoreDimensions: true => does not try to resize canvas
  //		 ignoreClear: true => does not clear canvas
  //		 offsetX: int => draws at a x offset
  //		 offsetY: int => draws at a y offset
  //		 scaleWidth: int => scales horizontally to width
  //		 scaleHeight: int => scales vertically to height
  //		 renderCallback: function => will call the function after the first render is completed
  //		 forceRedraw: function => will call the function on every frame, if it returns true, will redraw
  this.canvg = function (target, s, opts) {
    // no parameters
    if (target == null && s == null && opts == null) {
      var svgTags = document.querySelectorAll('svg')
      for (var i = 0; i < svgTags.length; i++) {
        var svgTag = svgTags[i]
        var c = document.createElement('canvas')
        c.width = svgTag.clientWidth
        c.height = svgTag.clientHeight
        svgTag.parentNode.insertBefore(c, svgTag)
        svgTag.parentNode.removeChild(svgTag)
        var div = document.createElement('div')
        div.appendChild(svgTag)
        canvg(c, div.innerHTML)
      }
      return
    }

    if (typeof target === 'string') {
      target = document.getElementById(target)
    }

    // store class on canvas
    if (target.svg != null) target.svg.stop()
    var svg = build(opts || {})
    // on i.e. 8 for flash canvas, we can't assign the property so check for it
    if (
      !(
        target.childNodes.length == 1 &&
        target.childNodes[0].nodeName == 'OBJECT'
      )
    ) {
      target.svg = svg
    }

    var ctx = target.getContext('2d')
    if (typeof s.documentElement !== 'undefined') {
      // load from xml doc
      svg.loadXmlDoc(ctx, s)
    } else if (s.substr(0, 1) == '<') {
      // load from xml string
      svg.loadXml(ctx, s)
    } else {
      // load from url
      svg.load(ctx, s)
    }
  }

  // see https://developer.mozilla.org/en-US/docs/Web/API/Element.matches
  var matchesSelector
  if (typeof Element.prototype.matches !== 'undefined') {
    matchesSelector = function (node, selector) {
      return node.matches(selector)
    }
  } else if (typeof Element.prototype.webkitMatchesSelector !== 'undefined') {
    matchesSelector = function (node, selector) {
      return node.webkitMatchesSelector(selector)
    }
  } else if (typeof Element.prototype.mozMatchesSelector !== 'undefined') {
    matchesSelector = function (node, selector) {
      return node.mozMatchesSelector(selector)
    }
  } else if (typeof Element.prototype.msMatchesSelector !== 'undefined') {
    matchesSelector = function (node, selector) {
      return node.msMatchesSelector(selector)
    }
  } else if (typeof Element.prototype.oMatchesSelector !== 'undefined') {
    matchesSelector = function (node, selector) {
      return node.oMatchesSelector(selector)
    }
  } else {
    // requires Sizzle: https://github.com/jquery/sizzle/wiki/Sizzle-Documentation
    // or jQuery: http://jquery.com/download/
    // or Zepto: http://zeptojs.com/#
    // without it, this is a ReferenceError

    if (typeof jQuery === 'function' || typeof Zepto === 'function') {
      matchesSelector = function (node, selector) {
        return $(node).is(selector)
      }
    }

    if (typeof matchesSelector === 'undefined') {
      matchesSelector = Sizzle.matchesSelector
    }
  }

  // slightly modified version of https://github.com/keeganstreet/specificity/blob/master/specificity.js
  var attributeRegex = /(\[[^\]]+\])/g
  var idRegex = /(#[^\s\+>~\.\[:]+)/g
  var classRegex = /(\.[^\s\+>~\.\[:]+)/g
  var pseudoElementRegex = /(::[^\s\+>~\.\[:]+|:first-line|:first-letter|:before|:after)/gi
  var pseudoClassWithBracketsRegex = /(:[\w-]+\([^\)]*\))/gi
  var pseudoClassRegex = /(:[^\s\+>~\.\[:]+)/g
  var elementRegex = /([^\s\+>~\.\[:]+)/g
  function getSelectorSpecificity (selector) {
    var typeCount = [0, 0, 0]
    var findMatch = function (regex, type) {
      var matches = selector.match(regex)
      if (matches == null) {
        return
      }
      typeCount[type] += matches.length
      selector = selector.replace(regex, ' ')
    }

    selector = selector.replace(/:not\(([^\)]*)\)/g, '     $1 ')
    selector = selector.replace(/{[^]*/gm, ' ')
    findMatch(attributeRegex, 1)
    findMatch(idRegex, 0)
    findMatch(classRegex, 1)
    findMatch(pseudoElementRegex, 2)
    findMatch(pseudoClassWithBracketsRegex, 1)
    findMatch(pseudoClassRegex, 1)
    selector = selector.replace(/[\*\s\+>~]/g, ' ')
    selector = selector.replace(/[#\.]/g, ' ')
    findMatch(elementRegex, 2)
    return typeCount.join('')
  }

  function build (opts) {
    var svg = { opts: opts }

    svg.FRAMERATE = 30
    svg.MAX_VIRTUAL_PIXELS = 30000

    svg.log = function (msg) {}
    if (svg.opts['log'] == true && typeof console !== 'undefined') {
      svg.log = function (msg) {
        console.log(msg)
      }
    }

    // globals
    svg.init = function (ctx) {
      var uniqueId = 0
      svg.UniqueId = function () {
        uniqueId++
        return 'canvg' + uniqueId
      }
      svg.Definitions = {}
      svg.Styles = {}
      svg.StylesSpecificity = {}
      svg.Animations = []
      svg.Images = []
      svg.ctx = ctx
      svg.ViewPort = new function () {
        this.viewPorts = []
        this.Clear = function () {
          this.viewPorts = []
        }
        this.SetCurrent = function (width, height) {
          this.viewPorts.push({ width: width, height: height })
        }
        this.RemoveCurrent = function () {
          this.viewPorts.pop()
        }
        this.Current = function () {
          return this.viewPorts[this.viewPorts.length - 1]
        }
        this.width = function () {
          return this.Current().width
        }
        this.height = function () {
          return this.Current().height
        }
        this.ComputeSize = function (d) {
          if (d != null && typeof d === 'number') return d
          if (d == 'x') return this.width()
          if (d == 'y') return this.height()
          return (
            Math.sqrt(Math.pow(this.width(), 2) + Math.pow(this.height(), 2)) /
            Math.sqrt(2)
          )
        }
      }()
    }
    svg.init()

    // images loaded
    svg.ImagesLoaded = function () {
      for (var i = 0; i < svg.Images.length; i++) {
        if (!svg.Images[i].loaded) return false
      }
      return true
    }

    // trim
    svg.trim = function (s) {
      return s.replace(/^\s+|\s+$/g, '')
    }

    // compress spaces
    svg.compressSpaces = function (s) {
      return s.replace(/[\s\r\t\n]+/gm, ' ')
    }

    // ajax
    svg.ajax = function (url) {
      var AJAX
      if (window.XMLHttpRequest) {
        AJAX = new XMLHttpRequest()
      } else {
        AJAX = new ActiveXObject('Microsoft.XMLHTTP')
      }
      if (AJAX) {
        AJAX.open('GET', url, false)
        AJAX.send(null)
        return AJAX.responseText
      }
      return null
    }

    // parse xml
    svg.parseXml = function (xml) {
      if (
        typeof Windows !== 'undefined' &&
        typeof Windows.Data !== 'undefined' &&
        typeof Windows.Data.Xml !== 'undefined'
      ) {
        var xmlDoc = new Windows.Data.Xml.Dom.XmlDocument()
        var settings = new Windows.Data.Xml.Dom.XmlLoadSettings()
        settings.prohibitDtd = false
        xmlDoc.loadXml(xml, settings)
        return xmlDoc
      } else if (window.DOMParser) {
        var parser = new DOMParser()
        return parser.parseFromString(xml, 'text/xml')
      } else {
        xml = xml.replace(/<!DOCTYPE svg[^>]*>/, '')
        var xmlDoc = new ActiveXObject('Microsoft.XMLDOM')
        xmlDoc.async = 'false'
        xmlDoc.loadXML(xml)
        return xmlDoc
      }
    }

    svg.Property = function (name, value) {
      this.name = name
      this.value = value
    }
    svg.Property.prototype.getValue = function () {
      return this.value
    }

    svg.Property.prototype.hasValue = function () {
      return this.value != null && this.value !== ''
    }

    // return the numerical value of the property
    svg.Property.prototype.numValue = function () {
      if (!this.hasValue()) return 0

      var n = parseFloat(this.value)
      if ((this.value + '').match(/%$/)) {
        n = n / 100.0
      }
      return n
    }

    svg.Property.prototype.valueOrDefault = function (def) {
      if (this.hasValue()) return this.value
      return def
    }

    svg.Property.prototype.numValueOrDefault = function (def) {
      if (this.hasValue()) return this.numValue()
      return def
    }

    // color extensions
    // augment the current color value with the opacity
    svg.Property.prototype.addOpacity = function (opacityProp) {
      var newValue = this.value
      if (
        opacityProp.value != null &&
        opacityProp.value != '' &&
        typeof this.value === 'string'
      ) {
        // can only add opacity to colors, not patterns
        var color = new RGBColor(this.value)
        if (color.ok) {
          newValue =
            'rgba(' +
            color.r +
            ', ' +
            color.g +
            ', ' +
            color.b +
            ', ' +
            opacityProp.numValue() +
            ')'
        }
      }
      return new svg.Property(this.name, newValue)
    }

    // definition extensions
    // get the definition from the definitions table
    svg.Property.prototype.getDefinition = function () {
      var name = this.value.match(/#([^\)'"]+)/)
      if (name) {
        name = name[1]
      }
      if (!name) {
        name = this.value
      }
      return svg.Definitions[name]
    }

    svg.Property.prototype.isUrlDefinition = function () {
      return this.value.indexOf('url(') == 0
    }

    svg.Property.prototype.getFillStyleDefinition = function (e, opacityProp) {
      var def = this.getDefinition()

      // gradient
      if (def != null && def.createGradient) {
        return def.createGradient(svg.ctx, e, opacityProp)
      }

      // pattern
      if (def != null && def.createPattern) {
        if (def.getHrefAttribute().hasValue()) {
          var pt = def.attribute('patternTransform')
          def = def.getHrefAttribute().getDefinition()
          if (pt.hasValue()) {
            def.attribute('patternTransform', true).value = pt.value
          }
        }
        return def.createPattern(svg.ctx, e)
      }

      return null
    }

    // length extensions
    svg.Property.prototype.getDPI = function (viewPort) {
      return 96.0 // TODO: compute?
    }

    svg.Property.prototype.getEM = function (viewPort) {
      var em = 12

      var fontSize = new svg.Property(
        'fontSize',
        svg.Font.Parse(svg.ctx.font).fontSize
      )
      if (fontSize.hasValue()) em = fontSize.toPixels(viewPort)

      return em
    }

    svg.Property.prototype.getUnits = function () {
      var s = this.value + ''
      return s.replace(/[0-9\.\-]/g, '')
    }

    // get the length as pixels
    svg.Property.prototype.toPixels = function (viewPort, processPercent) {
      if (!this.hasValue()) return 0
      var s = this.value + ''
      if (s.match(/em$/)) return this.numValue() * this.getEM(viewPort)
      if (s.match(/ex$/)) return this.numValue() * this.getEM(viewPort) / 2.0
      if (s.match(/px$/)) return this.numValue()
      if (s.match(/pt$/)) {
        return this.numValue() * this.getDPI(viewPort) * (1.0 / 72.0)
      }
      if (s.match(/pc$/)) return this.numValue() * 15
      if (s.match(/cm$/)) return this.numValue() * this.getDPI(viewPort) / 2.54
      if (s.match(/mm$/)) return this.numValue() * this.getDPI(viewPort) / 25.4
      if (s.match(/in$/)) return this.numValue() * this.getDPI(viewPort)
      if (s.match(/%$/)) {
        return this.numValue() * svg.ViewPort.ComputeSize(viewPort)
      }
      var n = this.numValue()
      if (processPercent && n < 1.0) {
        return n * svg.ViewPort.ComputeSize(viewPort)
      }
      return n
    }

    // time extensions
    // get the time as milliseconds
    svg.Property.prototype.toMilliseconds = function () {
      if (!this.hasValue()) return 0
      var s = this.value + ''
      if (s.match(/s$/)) return this.numValue() * 1000
      if (s.match(/ms$/)) return this.numValue()
      return this.numValue()
    }

    // angle extensions
    // get the angle as radians
    svg.Property.prototype.toRadians = function () {
      if (!this.hasValue()) return 0
      var s = this.value + ''
      if (s.match(/deg$/)) return this.numValue() * (Math.PI / 180.0)
      if (s.match(/grad$/)) return this.numValue() * (Math.PI / 200.0)
      if (s.match(/rad$/)) return this.numValue()
      return this.numValue() * (Math.PI / 180.0)
    }

    // text extensions
    // get the text baseline
    var textBaselineMapping = {
      baseline: 'alphabetic',
      'before-edge': 'top',
      'text-before-edge': 'top',
      middle: 'middle',
      central: 'middle',
      'after-edge': 'bottom',
      'text-after-edge': 'bottom',
      ideographic: 'ideographic',
      alphabetic: 'alphabetic',
      hanging: 'hanging',
      mathematical: 'alphabetic'
    }
    svg.Property.prototype.toTextBaseline = function () {
      if (!this.hasValue()) return null
      return textBaselineMapping[this.value]
    }

    // fonts
    svg.Font = new function () {
      this.Styles = 'normal|italic|oblique|inherit'
      this.Variants = 'normal|small-caps|inherit'
      this.Weights =
        'normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900|inherit'

      this.CreateFont = function (
        fontStyle,
        fontVariant,
        fontWeight,
        fontSize,
        fontFamily,
        inherit
      ) {
        var f =
          inherit != null
            ? this.Parse(inherit)
            : this.CreateFont('', '', '', '', '', svg.ctx.font)
        return {
          fontFamily: fontFamily || f.fontFamily,
          fontSize: fontSize || f.fontSize,
          fontStyle: fontStyle || f.fontStyle,
          fontWeight: fontWeight || f.fontWeight,
          fontVariant: fontVariant || f.fontVariant,
          toString: function () {
            return [
              this.fontStyle,
              this.fontVariant,
              this.fontWeight,
              this.fontSize,
              this.fontFamily
            ].join(' ')
          }
        }
      }

      var that = this
      this.Parse = function (s) {
        var f = {}
        var d = svg.trim(svg.compressSpaces(s || '')).split(' ')
        var set = {
          fontSize: false,
          fontStyle: false,
          fontWeight: false,
          fontVariant: false
        }
        var ff = ''
        for (var i = 0; i < d.length; i++) {
          if (!set.fontStyle && that.Styles.indexOf(d[i]) != -1) {
            if (d[i] != 'inherit') f.fontStyle = d[i]
            set.fontStyle = true
          } else if (!set.fontVariant && that.Variants.indexOf(d[i]) != -1) {
            if (d[i] != 'inherit') f.fontVariant = d[i]
            set.fontStyle = set.fontVariant = true
          } else if (!set.fontWeight && that.Weights.indexOf(d[i]) != -1) {
            if (d[i] != 'inherit') f.fontWeight = d[i]
            set.fontStyle = set.fontVariant = set.fontWeight = true
          } else if (!set.fontSize) {
            if (d[i] != 'inherit') f.fontSize = d[i].split('/')[0]
            set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true
          } else {
            if (d[i] != 'inherit') ff += d[i]
          }
        }
        if (ff != '') f.fontFamily = ff
        return f
      }
    }()

    // points and paths
    svg.ToNumberArray = function (s) {
      var a = svg
        .trim(svg.compressSpaces((s || '').replace(/,/g, ' ')))
        .split(' ')
      for (var i = 0; i < a.length; i++) {
        a[i] = parseFloat(a[i])
      }
      return a
    }
    svg.Point = function (x, y) {
      this.x = x
      this.y = y
    }
    svg.Point.prototype.angleTo = function (p) {
      return Math.atan2(p.y - this.y, p.x - this.x)
    }

    svg.Point.prototype.applyTransform = function (v) {
      var xp = this.x * v[0] + this.y * v[2] + v[4]
      var yp = this.x * v[1] + this.y * v[3] + v[5]
      this.x = xp
      this.y = yp
    }

    svg.CreatePoint = function (s) {
      var a = svg.ToNumberArray(s)
      return new svg.Point(a[0], a[1])
    }
    svg.CreatePath = function (s) {
      var a = svg.ToNumberArray(s)
      var path = []
      for (var i = 0; i < a.length; i += 2) {
        path.push(new svg.Point(a[i], a[i + 1]))
      }
      return path
    }

    // bounding box
    svg.BoundingBox = function (x1, y1, x2, y2) {
      // pass in initial points if you want
      this.x1 = Number.NaN
      this.y1 = Number.NaN
      this.x2 = Number.NaN
      this.y2 = Number.NaN

      this.x = function () {
        return this.x1
      }
      this.y = function () {
        return this.y1
      }
      this.width = function () {
        return this.x2 - this.x1
      }
      this.height = function () {
        return this.y2 - this.y1
      }

      this.addPoint = function (x, y) {
        if (x != null) {
          if (isNaN(this.x1) || isNaN(this.x2)) {
            this.x1 = x
            this.x2 = x
          }
          if (x < this.x1) this.x1 = x
          if (x > this.x2) this.x2 = x
        }

        if (y != null) {
          if (isNaN(this.y1) || isNaN(this.y2)) {
            this.y1 = y
            this.y2 = y
          }
          if (y < this.y1) this.y1 = y
          if (y > this.y2) this.y2 = y
        }
      }
      this.addX = function (x) {
        this.addPoint(x, null)
      }
      this.addY = function (y) {
        this.addPoint(null, y)
      }

      this.addBoundingBox = function (bb) {
        this.addPoint(bb.x1, bb.y1)
        this.addPoint(bb.x2, bb.y2)
      }

      this.addQuadraticCurve = function (p0x, p0y, p1x, p1y, p2x, p2y) {
        var cp1x = p0x + 2 / 3 * (p1x - p0x) // CP1 = QP0 + 2/3 *(QP1-QP0)
        var cp1y = p0y + 2 / 3 * (p1y - p0y) // CP1 = QP0 + 2/3 *(QP1-QP0)
        var cp2x = cp1x + 1 / 3 * (p2x - p0x) // CP2 = CP1 + 1/3 *(QP2-QP0)
        var cp2y = cp1y + 1 / 3 * (p2y - p0y) // CP2 = CP1 + 1/3 *(QP2-QP0)
        this.addBezierCurve(p0x, p0y, cp1x, cp2x, cp1y, cp2y, p2x, p2y)
      }

      this.addBezierCurve = function (p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
        // from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
        var p0 = [p0x, p0y],
          p1 = [p1x, p1y],
          p2 = [p2x, p2y],
          p3 = [p3x, p3y]
        this.addPoint(p0[0], p0[1])
        this.addPoint(p3[0], p3[1])

        for (i = 0; i <= 1; i++) {
          var f = function (t) {
            return (
              Math.pow(1 - t, 3) * p0[i] +
              3 * Math.pow(1 - t, 2) * t * p1[i] +
              3 * (1 - t) * Math.pow(t, 2) * p2[i] +
              Math.pow(t, 3) * p3[i]
            )
          }

          var b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i]
          var a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i]
          var c = 3 * p1[i] - 3 * p0[i]

          if (a == 0) {
            if (b == 0) continue
            var t = -c / b
            if (t > 0 && t < 1) {
              if (i == 0) this.addX(f(t))
              if (i == 1) this.addY(f(t))
            }
            continue
          }

          var b2ac = Math.pow(b, 2) - 4 * c * a
          if (b2ac < 0) continue
          var t1 = (-b + Math.sqrt(b2ac)) / (2 * a)
          if (t1 > 0 && t1 < 1) {
            if (i == 0) this.addX(f(t1))
            if (i == 1) this.addY(f(t1))
          }
          var t2 = (-b - Math.sqrt(b2ac)) / (2 * a)
          if (t2 > 0 && t2 < 1) {
            if (i == 0) this.addX(f(t2))
            if (i == 1) this.addY(f(t2))
          }
        }
      }

      this.isPointInBox = function (x, y) {
        return this.x1 <= x && x <= this.x2 && this.y1 <= y && y <= this.y2
      }

      this.addPoint(x1, y1)
      this.addPoint(x2, y2)
    }

    // transforms
    svg.Transform = function (v) {
      var that = this
      this.Type = {}

      // translate
      this.Type.translate = function (s) {
        this.p = svg.CreatePoint(s)
        this.apply = function (ctx) {
          ctx.translate(this.p.x || 0.0, this.p.y || 0.0)
        }
        this.unapply = function (ctx) {
          ctx.translate(-1.0 * this.p.x || 0.0, -1.0 * this.p.y || 0.0)
        }
        this.applyToPoint = function (p) {
          p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0])
        }
      }

      // rotate
      this.Type.rotate = function (s) {
        var a = svg.ToNumberArray(s)
        this.angle = new svg.Property('angle', a[0])
        this.cx = a[1] || 0
        this.cy = a[2] || 0
        this.apply = function (ctx) {
          ctx.translate(this.cx, this.cy)
          ctx.rotate(this.angle.toRadians())
          ctx.translate(-this.cx, -this.cy)
        }
        this.unapply = function (ctx) {
          ctx.translate(this.cx, this.cy)
          ctx.rotate(-1.0 * this.angle.toRadians())
          ctx.translate(-this.cx, -this.cy)
        }
        this.applyToPoint = function (p) {
          var a = this.angle.toRadians()
          p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0])
          p.applyTransform([
            Math.cos(a),
            Math.sin(a),
            -Math.sin(a),
            Math.cos(a),
            0,
            0
          ])
          p.applyTransform([1, 0, 0, 1, -this.p.x || 0.0, -this.p.y || 0.0])
        }
      }

      this.Type.scale = function (s) {
        this.p = svg.CreatePoint(s)
        this.apply = function (ctx) {
          ctx.scale(this.p.x || 1.0, this.p.y || this.p.x || 1.0)
        }
        this.unapply = function (ctx) {
          ctx.scale(1.0 / this.p.x || 1.0, 1.0 / this.p.y || this.p.x || 1.0)
        }
        this.applyToPoint = function (p) {
          p.applyTransform([this.p.x || 0.0, 0, 0, this.p.y || 0.0, 0, 0])
        }
      }

      this.Type.matrix = function (s) {
        this.m = svg.ToNumberArray(s)
        this.apply = function (ctx) {
          ctx.transform(
            this.m[0],
            this.m[1],
            this.m[2],
            this.m[3],
            this.m[4],
            this.m[5]
          )
        }
        this.unapply = function (ctx) {
          var a = this.m[0]
          var b = this.m[2]
          var c = this.m[4]
          var d = this.m[1]
          var e = this.m[3]
          var f = this.m[5]
          var g = 0.0
          var h = 0.0
          var i = 1.0
          var det =
            1 /
            (a * (e * i - f * h) - b * (d * i - f * g) + c * (d * h - e * g))
          ctx.transform(
            det * (e * i - f * h),
            det * (f * g - d * i),
            det * (c * h - b * i),
            det * (a * i - c * g),
            det * (b * f - c * e),
            det * (c * d - a * f)
          )
        }
        this.applyToPoint = function (p) {
          p.applyTransform(this.m)
        }
      }

      this.Type.SkewBase = function (s) {
        this.base = that.Type.matrix
        this.base(s)
        this.angle = new svg.Property('angle', s)
      }
      this.Type.SkewBase.prototype = new this.Type.matrix()

      this.Type.skewX = function (s) {
        this.base = that.Type.SkewBase
        this.base(s)
        this.m = [1, 0, Math.tan(this.angle.toRadians()), 1, 0, 0]
      }
      this.Type.skewX.prototype = new this.Type.SkewBase()

      this.Type.skewY = function (s) {
        this.base = that.Type.SkewBase
        this.base(s)
        this.m = [1, Math.tan(this.angle.toRadians()), 0, 1, 0, 0]
      }
      this.Type.skewY.prototype = new this.Type.SkewBase()

      this.transforms = []

      this.apply = function (ctx) {
        for (var i = 0; i < this.transforms.length; i++) {
          this.transforms[i].apply(ctx)
        }
      }

      this.unapply = function (ctx) {
        for (var i = this.transforms.length - 1; i >= 0; i--) {
          this.transforms[i].unapply(ctx)
        }
      }

      this.applyToPoint = function (p) {
        for (var i = 0; i < this.transforms.length; i++) {
          this.transforms[i].applyToPoint(p)
        }
      }

      var data = svg
        .trim(svg.compressSpaces(v))
        .replace(/\)([a-zA-Z])/g, ') $1')
        .replace(/\)(\s?,\s?)/g, ') ')
        .split(/\s(?=[a-z])/)
      for (var i = 0; i < data.length; i++) {
        var type = svg.trim(data[i].split('(')[0])
        var s = data[i].split('(')[1].replace(')', '')
        var transform = new this.Type[type](s)
        transform.type = type
        this.transforms.push(transform)
      }
    }

    // aspect ratio
    svg.AspectRatio = function (
      ctx,
      aspectRatio,
      width,
      desiredWidth,
      height,
      desiredHeight,
      minX,
      minY,
      refX,
      refY
    ) {
      // aspect ratio - http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute
      aspectRatio = svg.compressSpaces(aspectRatio)
      aspectRatio = aspectRatio.replace(/^defer\s/, '') // ignore defer
      var align = aspectRatio.split(' ')[0] || 'xMidYMid'
      var meetOrSlice = aspectRatio.split(' ')[1] || 'meet'

      // calculate scale
      var scaleX = width / desiredWidth
      var scaleY = height / desiredHeight
      var scaleMin = Math.min(scaleX, scaleY)
      var scaleMax = Math.max(scaleX, scaleY)
      if (meetOrSlice == 'meet') {
        desiredWidth *= scaleMin
        desiredHeight *= scaleMin
      }
      if (meetOrSlice == 'slice') {
        desiredWidth *= scaleMax
        desiredHeight *= scaleMax
      }

      refX = new svg.Property('refX', refX)
      refY = new svg.Property('refY', refY)
      if (refX.hasValue() && refY.hasValue()) {
        ctx.translate(
          -scaleMin * refX.toPixels('x'),
          -scaleMin * refY.toPixels('y')
        )
      } else {
        // align
        if (
          align.match(/^xMid/) &&
          ((meetOrSlice == 'meet' && scaleMin == scaleY) ||
            (meetOrSlice == 'slice' && scaleMax == scaleY))
        ) {
          ctx.translate(width / 2.0 - desiredWidth / 2.0, 0)
        }
        if (
          align.match(/YMid$/) &&
          ((meetOrSlice == 'meet' && scaleMin == scaleX) ||
            (meetOrSlice == 'slice' && scaleMax == scaleX))
        ) {
          ctx.translate(0, height / 2.0 - desiredHeight / 2.0)
        }
        if (
          align.match(/^xMax/) &&
          ((meetOrSlice == 'meet' && scaleMin == scaleY) ||
            (meetOrSlice == 'slice' && scaleMax == scaleY))
        ) {
          ctx.translate(width - desiredWidth, 0)
        }
        if (
          align.match(/YMax$/) &&
          ((meetOrSlice == 'meet' && scaleMin == scaleX) ||
            (meetOrSlice == 'slice' && scaleMax == scaleX))
        ) {
          ctx.translate(0, height - desiredHeight)
        }
      }

      // scale
      if (align == 'none') ctx.scale(scaleX, scaleY)
      else if (meetOrSlice == 'meet') ctx.scale(scaleMin, scaleMin)
      else if (meetOrSlice == 'slice') ctx.scale(scaleMax, scaleMax)

      // translate
      ctx.translate(minX == null ? 0 : -minX, minY == null ? 0 : -minY)
    }

    // elements
    svg.Element = {}

    svg.EmptyProperty = new svg.Property('EMPTY', '')

    svg.Element.ElementBase = function (node) {
      this.attributes = {}
      this.styles = {}
      this.stylesSpecificity = {}
      this.children = []

      // get or create attribute
      this.attribute = function (name, createIfNotExists) {
        var a = this.attributes[name]
        if (a != null) return a

        if (createIfNotExists == true) {
          a = new svg.Property(name, '')
          this.attributes[name] = a
        }
        return a || svg.EmptyProperty
      }

      this.getHrefAttribute = function () {
        for (var a in this.attributes) {
          if (a == 'href' || a.match(/:href$/)) {
            return this.attributes[a]
          }
        }
        return svg.EmptyProperty
      }

      // get or create style, crawls up node tree
      this.style = function (name, createIfNotExists, skipAncestors) {
        var s = this.styles[name]
        if (s != null) return s

        var a = this.attribute(name)
        if (a != null && a.hasValue()) {
          this.styles[name] = a // move up to me to cache
          return a
        }

        if (skipAncestors != true) {
          var p = this.parent
          if (p != null) {
            var ps = p.style(name)
            if (ps != null && ps.hasValue()) {
              return ps
            }
          }
        }

        if (createIfNotExists == true) {
          s = new svg.Property(name, '')
          this.styles[name] = s
        }
        return s || svg.EmptyProperty
      }

      // base render
      this.render = function (ctx) {
        // don't render display=none
        if (this.style('display').value == 'none') return

        // don't render visibility=hidden
        if (this.style('visibility').value == 'hidden') return

        ctx.save()
        if (this.attribute('mask').hasValue()) {
          // mask
          var mask = this.attribute('mask').getDefinition()
          if (mask != null) mask.apply(ctx, this)
        } else if (this.style('filter').hasValue()) {
          // filter
          var filter = this.style('filter').getDefinition()
          if (filter != null) filter.apply(ctx, this)
        } else {
          this.setContext(ctx)
          this.renderChildren(ctx)
          this.clearContext(ctx)
        }
        ctx.restore()
      }

      // base set context
      this.setContext = function (ctx) {
        // OVERRIDE ME!
      }

      // base clear context
      this.clearContext = function (ctx) {
        // OVERRIDE ME!
      }

      // base render children
      this.renderChildren = function (ctx) {
        for (var i = 0; i < this.children.length; i++) {
          this.children[i].render(ctx)
        }
      }

      this.addChild = function (childNode, create) {
        var child = childNode
        if (create) child = svg.CreateElement(childNode)
        child.parent = this
        if (child.type != 'title') {
          this.children.push(child)
        }
      }

      this.addStylesFromStyleDefinition = function () {
        // add styles
        for (var selector in svg.Styles) {
          if (selector[0] != '@' && matchesSelector(node, selector)) {
            var styles = svg.Styles[selector]
            var specificity = svg.StylesSpecificity[selector]
            if (styles != null) {
              for (var name in styles) {
                var existingSpecificity = this.stylesSpecificity[name]
                if (typeof existingSpecificity === 'undefined') {
                  existingSpecificity = '000'
                }
                if (specificity > existingSpecificity) {
                  this.styles[name] = styles[name]
                  this.stylesSpecificity[name] = specificity
                }
              }
            }
          }
        }
      }

      if (node != null && node.nodeType == 1) {
        // ELEMENT_NODE
        // add attributes
        for (var i = 0; i < node.attributes.length; i++) {
          var attribute = node.attributes[i]
          this.attributes[attribute.nodeName] = new svg.Property(
            attribute.nodeName,
            attribute.value
          )
        }

        this.addStylesFromStyleDefinition()

        // add inline styles
        if (this.attribute('style').hasValue()) {
          var styles = this.attribute('style').value.split(';')
          for (var i = 0; i < styles.length; i++) {
            if (svg.trim(styles[i]) != '') {
              var style = styles[i].split(':')
              var name = svg.trim(style[0])
              var value = svg.trim(style[1])
              this.styles[name] = new svg.Property(name, value)
            }
          }
        }

        // add id
        if (this.attribute('id').hasValue()) {
          if (svg.Definitions[this.attribute('id').value] == null) {
            svg.Definitions[this.attribute('id').value] = this
          }
        }

        // add children
        for (var i = 0; i < node.childNodes.length; i++) {
          var childNode = node.childNodes[i]
          if (childNode.nodeType == 1) this.addChild(childNode, true) // ELEMENT_NODE
          if (
            this.captureTextNodes &&
            (childNode.nodeType == 3 || childNode.nodeType == 4)
          ) {
            var text =
              childNode.value || childNode.text || childNode.textContent || ''
            if (svg.compressSpaces(text) != '') {
              this.addChild(new svg.Element.tspan(childNode), false) // TEXT_NODE
            }
          }
        }
      }
    }

    svg.Element.RenderedElementBase = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.setContext = function (ctx) {
        // fill
        if (this.style('fill').isUrlDefinition()) {
          var fs = this.style('fill').getFillStyleDefinition(
            this,
            this.style('fill-opacity')
          )
          if (fs != null) ctx.fillStyle = fs
        } else if (this.style('fill').hasValue()) {
          var fillStyle = this.style('fill')
          if (fillStyle.value == 'currentColor') {
            fillStyle.value = this.style('color').value
          }
          if (fillStyle.value != 'inherit') {
            ctx.fillStyle =
              fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value
          }
        }
        if (this.style('fill-opacity').hasValue()) {
          var fillStyle = new svg.Property('fill', ctx.fillStyle)
          fillStyle = fillStyle.addOpacity(this.style('fill-opacity'))
          ctx.fillStyle = fillStyle.value
        }

        // stroke
        if (this.style('stroke').isUrlDefinition()) {
          var fs = this.style('stroke').getFillStyleDefinition(
            this,
            this.style('stroke-opacity')
          )
          if (fs != null) ctx.strokeStyle = fs
        } else if (this.style('stroke').hasValue()) {
          var strokeStyle = this.style('stroke')
          if (strokeStyle.value == 'currentColor') {
            strokeStyle.value = this.style('color').value
          }
          if (strokeStyle.value != 'inherit') {
            ctx.strokeStyle =
              strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value
          }
        }
        if (this.style('stroke-opacity').hasValue()) {
          var strokeStyle = new svg.Property('stroke', ctx.strokeStyle)
          strokeStyle = strokeStyle.addOpacity(this.style('stroke-opacity'))
          ctx.strokeStyle = strokeStyle.value
        }
        if (this.style('stroke-width').hasValue()) {
          var newLineWidth = this.style('stroke-width').toPixels()
          ctx.lineWidth = newLineWidth == 0 ? 0.001 : newLineWidth // browsers don't respect 0
        }
        if (this.style('stroke-linecap').hasValue()) {
          ctx.lineCap = this.style('stroke-linecap').value
        }
        if (this.style('stroke-linejoin').hasValue()) {
          ctx.lineJoin = this.style('stroke-linejoin').value
        }
        if (this.style('stroke-miterlimit').hasValue()) {
          ctx.miterLimit = this.style('stroke-miterlimit').value
        }
        if (
          this.style('stroke-dasharray').hasValue() &&
          this.style('stroke-dasharray').value != 'none'
        ) {
          var gaps = svg.ToNumberArray(this.style('stroke-dasharray').value)
          if (typeof ctx.setLineDash !== 'undefined') {
            ctx.setLineDash(gaps)
          } else if (typeof ctx.webkitLineDash !== 'undefined') {
            ctx.webkitLineDash = gaps
          } else if (
            typeof ctx.mozDash !== 'undefined' &&
            !(gaps.length == 1 && gaps[0] == 0)
          ) {
            ctx.mozDash = gaps
          }

          var offset = this.style('stroke-dashoffset').numValueOrDefault(1)
          if (typeof ctx.lineDashOffset !== 'undefined') {
            ctx.lineDashOffset = offset
          } else if (typeof ctx.webkitLineDashOffset !== 'undefined') {
            ctx.webkitLineDashOffset = offset
          } else if (typeof ctx.mozDashOffset !== 'undefined') {
            ctx.mozDashOffset = offset
          }
        }

        // font
        if (typeof ctx.font !== 'undefined') {
          ctx.font = svg.Font
            .CreateFont(
              this.style('font-style').value,
              this.style('font-variant').value,
              this.style('font-weight').value,
              this.style('font-size').hasValue()
                ? this.style('font-size').toPixels() + 'px'
                : '',
              this.style('font-family').value
            )
            .toString()
        }

        // transform
        if (this.style('transform', false, true).hasValue()) {
          var transform = new svg.Transform(
            this.style('transform', false, true).value
          )
          transform.apply(ctx)
        }

        // clip
        if (this.attribute('clip-path', false, true).hasValue()) {
          var clip = this.attribute('clip-path', false, true).getDefinition()
          if (clip != null) clip.apply(ctx)
        }

        // opacity
        if (this.style('opacity').hasValue()) {
          ctx.globalAlpha = this.style('opacity').numValue()
        }
      }
    }
    svg.Element.RenderedElementBase.prototype = new svg.Element.ElementBase()

    svg.Element.PathElementBase = function (node) {
      this.base = svg.Element.RenderedElementBase
      this.base(node)

      this.path = function (ctx) {
        if (ctx != null) ctx.beginPath()
        return new svg.BoundingBox()
      }

      this.renderChildren = function (ctx) {
        this.path(ctx)
        svg.Mouse.checkPath(this, ctx)
        if (ctx.fillStyle != '') {
          if (this.style('fill-rule').valueOrDefault('inherit') != 'inherit') {
            ctx.fill(this.style('fill-rule').value)
          } else {
            ctx.fill()
          }
        }
        if (ctx.strokeStyle != '') ctx.stroke()

        var markers = this.getMarkers()
        if (markers != null) {
          if (this.style('marker-start').isUrlDefinition()) {
            var marker = this.style('marker-start').getDefinition()
            marker.render(ctx, markers[0][0], markers[0][1])
          }
          if (this.style('marker-mid').isUrlDefinition()) {
            var marker = this.style('marker-mid').getDefinition()
            for (var i = 1; i < markers.length - 1; i++) {
              marker.render(ctx, markers[i][0], markers[i][1])
            }
          }
          if (this.style('marker-end').isUrlDefinition()) {
            var marker = this.style('marker-end').getDefinition()
            marker.render(
              ctx,
              markers[markers.length - 1][0],
              markers[markers.length - 1][1]
            )
          }
        }
      }

      this.getBoundingBox = function () {
        return this.path()
      }

      this.getMarkers = function () {
        return null
      }
    }
    svg.Element.PathElementBase.prototype = new svg.Element
      .RenderedElementBase()

    // svg element
    svg.Element.svg = function (node) {
      this.base = svg.Element.RenderedElementBase
      this.base(node)

      this.baseClearContext = this.clearContext
      this.clearContext = function (ctx) {
        this.baseClearContext(ctx)
        svg.ViewPort.RemoveCurrent()
      }

      this.baseSetContext = this.setContext
      this.setContext = function (ctx) {
        // initial values and defaults
        ctx.strokeStyle = 'rgba(0,0,0,0)'
        ctx.lineCap = 'butt'
        ctx.lineJoin = 'miter'
        ctx.miterLimit = 4
        if (
          typeof ctx.font !== 'undefined' &&
          typeof window.getComputedStyle !== 'undefined'
        ) {
          ctx.font = window
            .getComputedStyle(ctx.canvas)
            .getPropertyValue('font')
        }

        this.baseSetContext(ctx)

        // create new view port
        if (!this.attribute('x').hasValue()) this.attribute('x', true).value = 0
        if (!this.attribute('y').hasValue()) this.attribute('y', true).value = 0
        ctx.translate(
          this.attribute('x').toPixels('x'),
          this.attribute('y').toPixels('y')
        )

        var width = svg.ViewPort.width()
        var height = svg.ViewPort.height()

        if (!this.attribute('width').hasValue()) {
          this.attribute('width', true).value = '100%'
        }
        if (!this.attribute('height').hasValue()) {
          this.attribute('height', true).value = '100%'
        }
        if (typeof this.root === 'undefined') {
          width = this.attribute('width').toPixels('x')
          height = this.attribute('height').toPixels('y')

          var x = 0
          var y = 0
          if (
            this.attribute('refX').hasValue() &&
            this.attribute('refY').hasValue()
          ) {
            x = -this.attribute('refX').toPixels('x')
            y = -this.attribute('refY').toPixels('y')
          }

          if (
            this.attribute('overflow').valueOrDefault('hidden') != 'visible'
          ) {
            ctx.beginPath()
            ctx.moveTo(x, y)
            ctx.lineTo(width, y)
            ctx.lineTo(width, height)
            ctx.lineTo(x, height)
            ctx.closePath()
            ctx.clip()
          }
        }
        svg.ViewPort.SetCurrent(width, height)

        // viewbox
        if (this.attribute('viewBox').hasValue()) {
          var viewBox = svg.ToNumberArray(this.attribute('viewBox').value)
          var minX = viewBox[0]
          var minY = viewBox[1]
          width = viewBox[2]
          height = viewBox[3]

          svg.AspectRatio(
            ctx,
            this.attribute('preserveAspectRatio').value,
            svg.ViewPort.width(),
            width,
            svg.ViewPort.height(),
            height,
            minX,
            minY,
            this.attribute('refX').value,
            this.attribute('refY').value
          )

          svg.ViewPort.RemoveCurrent()
          svg.ViewPort.SetCurrent(viewBox[2], viewBox[3])
        }
      }
    }
    svg.Element.svg.prototype = new svg.Element.RenderedElementBase()

    // rect element
    svg.Element.rect = function (node) {
      this.base = svg.Element.PathElementBase
      this.base(node)

      this.path = function (ctx) {
        var x = this.attribute('x').toPixels('x')
        var y = this.attribute('y').toPixels('y')
        var width = this.attribute('width').toPixels('x')
        var height = this.attribute('height').toPixels('y')
        var rx = this.attribute('rx').toPixels('x')
        var ry = this.attribute('ry').toPixels('y')
        if (
          this.attribute('rx').hasValue() &&
          !this.attribute('ry').hasValue()
        ) {
          ry = rx
        }
        if (
          this.attribute('ry').hasValue() &&
          !this.attribute('rx').hasValue()
        ) {
          rx = ry
        }
        rx = Math.min(rx, width / 2.0)
        ry = Math.min(ry, height / 2.0)
        if (ctx != null) {
          ctx.beginPath()
          ctx.moveTo(x + rx, y)
          ctx.lineTo(x + width - rx, y)
          ctx.quadraticCurveTo(x + width, y, x + width, y + ry)
          ctx.lineTo(x + width, y + height - ry)
          ctx.quadraticCurveTo(
            x + width,
            y + height,
            x + width - rx,
            y + height
          )
          ctx.lineTo(x + rx, y + height)
          ctx.quadraticCurveTo(x, y + height, x, y + height - ry)
          ctx.lineTo(x, y + ry)
          ctx.quadraticCurveTo(x, y, x + rx, y)
          ctx.closePath()
        }

        return new svg.BoundingBox(x, y, x + width, y + height)
      }
    }
    svg.Element.rect.prototype = new svg.Element.PathElementBase()

    // circle element
    svg.Element.circle = function (node) {
      this.base = svg.Element.PathElementBase
      this.base(node)

      this.path = function (ctx) {
        var cx = this.attribute('cx').toPixels('x')
        var cy = this.attribute('cy').toPixels('y')
        var r = this.attribute('r').toPixels()

        if (ctx != null) {
          ctx.beginPath()
          ctx.arc(cx, cy, r, 0, Math.PI * 2, true)
          ctx.closePath()
        }

        return new svg.BoundingBox(cx - r, cy - r, cx + r, cy + r)
      }
    }
    svg.Element.circle.prototype = new svg.Element.PathElementBase()

    // ellipse element
    svg.Element.ellipse = function (node) {
      this.base = svg.Element.PathElementBase
      this.base(node)

      this.path = function (ctx) {
        var KAPPA = 4 * ((Math.sqrt(2) - 1) / 3)
        var rx = this.attribute('rx').toPixels('x')
        var ry = this.attribute('ry').toPixels('y')
        var cx = this.attribute('cx').toPixels('x')
        var cy = this.attribute('cy').toPixels('y')

        if (ctx != null) {
          ctx.beginPath()
          ctx.moveTo(cx, cy - ry)
          ctx.bezierCurveTo(
            cx + KAPPA * rx,
            cy - ry,
            cx + rx,
            cy - KAPPA * ry,
            cx + rx,
            cy
          )
          ctx.bezierCurveTo(
            cx + rx,
            cy + KAPPA * ry,
            cx + KAPPA * rx,
            cy + ry,
            cx,
            cy + ry
          )
          ctx.bezierCurveTo(
            cx - KAPPA * rx,
            cy + ry,
            cx - rx,
            cy + KAPPA * ry,
            cx - rx,
            cy
          )
          ctx.bezierCurveTo(
            cx - rx,
            cy - KAPPA * ry,
            cx - KAPPA * rx,
            cy - ry,
            cx,
            cy - ry
          )
          ctx.closePath()
        }

        return new svg.BoundingBox(cx - rx, cy - ry, cx + rx, cy + ry)
      }
    }
    svg.Element.ellipse.prototype = new svg.Element.PathElementBase()

    // line element
    svg.Element.line = function (node) {
      this.base = svg.Element.PathElementBase
      this.base(node)

      this.getPoints = function () {
        return [
          new svg.Point(
            this.attribute('x1').toPixels('x'),
            this.attribute('y1').toPixels('y')
          ),
          new svg.Point(
            this.attribute('x2').toPixels('x'),
            this.attribute('y2').toPixels('y')
          )
        ]
      }

      this.path = function (ctx) {
        var points = this.getPoints()

        if (ctx != null) {
          ctx.beginPath()
          ctx.moveTo(points[0].x, points[0].y)
          ctx.lineTo(points[1].x, points[1].y)
        }

        return new svg.BoundingBox(
          points[0].x,
          points[0].y,
          points[1].x,
          points[1].y
        )
      }

      this.getMarkers = function () {
        var points = this.getPoints()
        var a = points[0].angleTo(points[1])
        return [[points[0], a], [points[1], a]]
      }
    }
    svg.Element.line.prototype = new svg.Element.PathElementBase()

    // polyline element
    svg.Element.polyline = function (node) {
      this.base = svg.Element.PathElementBase
      this.base(node)

      this.points = svg.CreatePath(this.attribute('points').value)
      this.path = function (ctx) {
        var bb = new svg.BoundingBox(this.points[0].x, this.points[0].y)
        if (ctx != null) {
          ctx.beginPath()
          ctx.moveTo(this.points[0].x, this.points[0].y)
        }
        for (var i = 1; i < this.points.length; i++) {
          bb.addPoint(this.points[i].x, this.points[i].y)
          if (ctx != null) ctx.lineTo(this.points[i].x, this.points[i].y)
        }
        return bb
      }

      this.getMarkers = function () {
        var markers = []
        for (var i = 0; i < this.points.length - 1; i++) {
          markers.push([
            this.points[i],
            this.points[i].angleTo(this.points[i + 1])
          ])
        }
        markers.push([
          this.points[this.points.length - 1],
          markers[markers.length - 1][1]
        ])
        return markers
      }
    }
    svg.Element.polyline.prototype = new svg.Element.PathElementBase()

    // polygon element
    svg.Element.polygon = function (node) {
      this.base = svg.Element.polyline
      this.base(node)

      this.basePath = this.path
      this.path = function (ctx) {
        var bb = this.basePath(ctx)
        if (ctx != null) {
          ctx.lineTo(this.points[0].x, this.points[0].y)
          ctx.closePath()
        }
        return bb
      }
    }
    svg.Element.polygon.prototype = new svg.Element.polyline()

    // path element
    svg.Element.path = function (node) {
      this.base = svg.Element.PathElementBase
      this.base(node)

      var d = this.attribute('d').value
      // TODO: convert to real lexer based on http://www.w3.org/TR/SVG11/paths.html#PathDataBNF
      d = d.replace(/,/gm, ' ') // get rid of all commas
      // As the end of a match can also be the start of the next match, we need to run this replace twice.
      for (var i = 0; i < 2; i++) {
        d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([^\s])/gm, '$1 $2')
      } // suffix commands with spaces
      d = d.replace(/([^\s])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2') // prefix commands with spaces
      d = d.replace(/([0-9])([+\-])/gm, '$1 $2') // separate digits on +- signs
      // Again, we need to run this twice to find all occurances
      for (var i = 0; i < 2; i++) {
        d = d.replace(/(\.[0-9]*)(\.)/gm, '$1 $2')
      } // separate digits when they start with a comma
      d = d.replace(/([Aa](\s+[0-9]+){3})\s+([01])\s*([01])/gm, '$1 $3 $4 ') // shorthand elliptical arc path syntax
      d = svg.compressSpaces(d) // compress multiple spaces
      d = svg.trim(d)
      this.PathParser = new function (d) {
        this.tokens = d.split(' ')

        this.reset = function () {
          this.i = -1
          this.command = ''
          this.previousCommand = ''
          this.start = new svg.Point(0, 0)
          this.control = new svg.Point(0, 0)
          this.current = new svg.Point(0, 0)
          this.points = []
          this.angles = []
        }

        this.isEnd = function () {
          return this.i >= this.tokens.length - 1
        }

        this.isCommandOrEnd = function () {
          if (this.isEnd()) return true
          return this.tokens[this.i + 1].match(/^[A-Za-z]$/) != null
        }

        this.isRelativeCommand = function () {
          switch (this.command) {
            case 'm':
            case 'l':
            case 'h':
            case 'v':
            case 'c':
            case 's':
            case 'q':
            case 't':
            case 'a':
            case 'z':
              return true
              break
          }
          return false
        }

        this.getToken = function () {
          this.i++
          return this.tokens[this.i]
        }

        this.getScalar = function () {
          return parseFloat(this.getToken())
        }

        this.nextCommand = function () {
          this.previousCommand = this.command
          this.command = this.getToken()
        }

        this.getPoint = function () {
          var p = new svg.Point(this.getScalar(), this.getScalar())
          return this.makeAbsolute(p)
        }

        this.getAsControlPoint = function () {
          var p = this.getPoint()
          this.control = p
          return p
        }

        this.getAsCurrentPoint = function () {
          var p = this.getPoint()
          this.current = p
          return p
        }

        this.getReflectedControlPoint = function () {
          if (
            this.previousCommand.toLowerCase() != 'c' &&
            this.previousCommand.toLowerCase() != 's' &&
            this.previousCommand.toLowerCase() != 'q' &&
            this.previousCommand.toLowerCase() != 't'
          ) {
            return this.current
          }

          // reflect point
          var p = new svg.Point(
            2 * this.current.x - this.control.x,
            2 * this.current.y - this.control.y
          )
          return p
        }

        this.makeAbsolute = function (p) {
          if (this.isRelativeCommand()) {
            p.x += this.current.x
            p.y += this.current.y
          }
          return p
        }

        this.addMarker = function (p, from, priorTo) {
          // if the last angle isn't filled in because we didn't have this point yet ...
          if (
            priorTo != null &&
            this.angles.length > 0 &&
            this.angles[this.angles.length - 1] == null
          ) {
            this.angles[this.angles.length - 1] = this.points[
              this.points.length - 1
            ].angleTo(priorTo)
          }
          this.addMarkerAngle(p, from == null ? null : from.angleTo(p))
        }

        this.addMarkerAngle = function (p, a) {
          this.points.push(p)
          this.angles.push(a)
        }

        this.getMarkerPoints = function () {
          return this.points
        }
        this.getMarkerAngles = function () {
          for (var i = 0; i < this.angles.length; i++) {
            if (this.angles[i] == null) {
              for (var j = i + 1; j < this.angles.length; j++) {
                if (this.angles[j] != null) {
                  this.angles[i] = this.angles[j]
                  break
                }
              }
            }
          }
          return this.angles
        }
      }(d)

      this.path = function (ctx) {
        var pp = this.PathParser
        pp.reset()

        var bb = new svg.BoundingBox()
        if (ctx != null) ctx.beginPath()
        while (!pp.isEnd()) {
          pp.nextCommand()
          switch (pp.command) {
            case 'M':
            case 'm':
              var p = pp.getAsCurrentPoint()
              pp.addMarker(p)
              bb.addPoint(p.x, p.y)
              if (ctx != null) ctx.moveTo(p.x, p.y)
              pp.start = pp.current
              while (!pp.isCommandOrEnd()) {
                var p = pp.getAsCurrentPoint()
                pp.addMarker(p, pp.start)
                bb.addPoint(p.x, p.y)
                if (ctx != null) ctx.lineTo(p.x, p.y)
              }
              break
            case 'L':
            case 'l':
              while (!pp.isCommandOrEnd()) {
                var c = pp.current
                var p = pp.getAsCurrentPoint()
                pp.addMarker(p, c)
                bb.addPoint(p.x, p.y)
                if (ctx != null) ctx.lineTo(p.x, p.y)
              }
              break
            case 'H':
            case 'h':
              while (!pp.isCommandOrEnd()) {
                var newP = new svg.Point(
                  (pp.isRelativeCommand() ? pp.current.x : 0) + pp.getScalar(),
                  pp.current.y
                )
                pp.addMarker(newP, pp.current)
                pp.current = newP
                bb.addPoint(pp.current.x, pp.current.y)
                if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y)
              }
              break
            case 'V':
            case 'v':
              while (!pp.isCommandOrEnd()) {
                var newP = new svg.Point(
                  pp.current.x,
                  (pp.isRelativeCommand() ? pp.current.y : 0) + pp.getScalar()
                )
                pp.addMarker(newP, pp.current)
                pp.current = newP
                bb.addPoint(pp.current.x, pp.current.y)
                if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y)
              }
              break
            case 'C':
            case 'c':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current
                var p1 = pp.getPoint()
                var cntrl = pp.getAsControlPoint()
                var cp = pp.getAsCurrentPoint()
                pp.addMarker(cp, cntrl, p1)
                bb.addBezierCurve(
                  curr.x,
                  curr.y,
                  p1.x,
                  p1.y,
                  cntrl.x,
                  cntrl.y,
                  cp.x,
                  cp.y
                )
                if (ctx != null) {
                  ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y)
                }
              }
              break
            case 'S':
            case 's':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current
                var p1 = pp.getReflectedControlPoint()
                var cntrl = pp.getAsControlPoint()
                var cp = pp.getAsCurrentPoint()
                pp.addMarker(cp, cntrl, p1)
                bb.addBezierCurve(
                  curr.x,
                  curr.y,
                  p1.x,
                  p1.y,
                  cntrl.x,
                  cntrl.y,
                  cp.x,
                  cp.y
                )
                if (ctx != null) {
                  ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y)
                }
              }
              break
            case 'Q':
            case 'q':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current
                var cntrl = pp.getAsControlPoint()
                var cp = pp.getAsCurrentPoint()
                pp.addMarker(cp, cntrl, cntrl)
                bb.addQuadraticCurve(
                  curr.x,
                  curr.y,
                  cntrl.x,
                  cntrl.y,
                  cp.x,
                  cp.y
                )
                if (ctx != null) {
                  ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y)
                }
              }
              break
            case 'T':
            case 't':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current
                var cntrl = pp.getReflectedControlPoint()
                pp.control = cntrl
                var cp = pp.getAsCurrentPoint()
                pp.addMarker(cp, cntrl, cntrl)
                bb.addQuadraticCurve(
                  curr.x,
                  curr.y,
                  cntrl.x,
                  cntrl.y,
                  cp.x,
                  cp.y
                )
                if (ctx != null) {
                  ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y)
                }
              }
              break
            case 'A':
            case 'a':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current
                var rx = pp.getScalar()
                var ry = pp.getScalar()
                var xAxisRotation = pp.getScalar() * (Math.PI / 180.0)
                var largeArcFlag = pp.getScalar()
                var sweepFlag = pp.getScalar()
                var cp = pp.getAsCurrentPoint()

                // Conversion from endpoint to center parameterization
                // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
                // x1', y1'
                var currp = new svg.Point(
                  Math.cos(xAxisRotation) * (curr.x - cp.x) / 2.0 +
                    Math.sin(xAxisRotation) * (curr.y - cp.y) / 2.0,
                  -Math.sin(xAxisRotation) * (curr.x - cp.x) / 2.0 +
                    Math.cos(xAxisRotation) * (curr.y - cp.y) / 2.0
                )
                // adjust radii
                var l =
                  Math.pow(currp.x, 2) / Math.pow(rx, 2) +
                  Math.pow(currp.y, 2) / Math.pow(ry, 2)
                if (l > 1) {
                  rx *= Math.sqrt(l)
                  ry *= Math.sqrt(l)
                }
                // cx', cy'
                var s =
                  (largeArcFlag == sweepFlag ? -1 : 1) *
                  Math.sqrt(
                    (Math.pow(rx, 2) * Math.pow(ry, 2) -
                      Math.pow(rx, 2) * Math.pow(currp.y, 2) -
                      Math.pow(ry, 2) * Math.pow(currp.x, 2)) /
                      (Math.pow(rx, 2) * Math.pow(currp.y, 2) +
                        Math.pow(ry, 2) * Math.pow(currp.x, 2))
                  )
                if (isNaN(s)) s = 0
                var cpp = new svg.Point(
                  s * rx * currp.y / ry,
                  s * -ry * currp.x / rx
                )
                // cx, cy
                var centp = new svg.Point(
                  (curr.x + cp.x) / 2.0 +
                    Math.cos(xAxisRotation) * cpp.x -
                    Math.sin(xAxisRotation) * cpp.y,
                  (curr.y + cp.y) / 2.0 +
                    Math.sin(xAxisRotation) * cpp.x +
                    Math.cos(xAxisRotation) * cpp.y
                )
                // vector magnitude
                var m = function (v) {
                  return Math.sqrt(Math.pow(v[0], 2) + Math.pow(v[1], 2))
                }
                // ratio between two vectors
                var r = function (u, v) {
                  return (u[0] * v[0] + u[1] * v[1]) / (m(u) * m(v))
                }
                // angle between two vectors
                var a = function (u, v) {
                  return (
                    (u[0] * v[1] < u[1] * v[0] ? -1 : 1) * Math.acos(r(u, v))
                  )
                }
                // initial angle
                var a1 = a(
                  [1, 0],
                  [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry]
                )
                // angle delta
                var u = [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry]
                var v = [(-currp.x - cpp.x) / rx, (-currp.y - cpp.y) / ry]
                var ad = a(u, v)
                if (r(u, v) <= -1) ad = Math.PI
                if (r(u, v) >= 1) ad = 0

                // for markers
                var dir = 1 - sweepFlag ? 1.0 : -1.0
                var ah = a1 + dir * (ad / 2.0)
                var halfWay = new svg.Point(
                  centp.x + rx * Math.cos(ah),
                  centp.y + ry * Math.sin(ah)
                )
                pp.addMarkerAngle(halfWay, ah - dir * Math.PI / 2)
                pp.addMarkerAngle(cp, ah - dir * Math.PI)

                bb.addPoint(cp.x, cp.y) // TODO: this is too naive, make it better
                if (ctx != null) {
                  var r = rx > ry ? rx : ry
                  var sx = rx > ry ? 1 : rx / ry
                  var sy = rx > ry ? ry / rx : 1

                  ctx.translate(centp.x, centp.y)
                  ctx.rotate(xAxisRotation)
                  ctx.scale(sx, sy)
                  ctx.arc(0, 0, r, a1, a1 + ad, 1 - sweepFlag)
                  ctx.scale(1 / sx, 1 / sy)
                  ctx.rotate(-xAxisRotation)
                  ctx.translate(-centp.x, -centp.y)
                }
              }
              break
            case 'Z':
            case 'z':
              if (ctx != null) ctx.closePath()
              pp.current = pp.start
          }
        }

        return bb
      }

      this.getMarkers = function () {
        var points = this.PathParser.getMarkerPoints()
        var angles = this.PathParser.getMarkerAngles()

        var markers = []
        for (var i = 0; i < points.length; i++) {
          markers.push([points[i], angles[i]])
        }
        return markers
      }
    }
    svg.Element.path.prototype = new svg.Element.PathElementBase()

    // pattern element
    svg.Element.pattern = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.createPattern = function (ctx, element) {
        var width = this.attribute('width').toPixels('x', true)
        var height = this.attribute('height').toPixels('y', true)

        // render me using a temporary svg element
        var tempSvg = new svg.Element.svg()
        tempSvg.attributes['viewBox'] = new svg.Property(
          'viewBox',
          this.attribute('viewBox').value
        )
        tempSvg.attributes['width'] = new svg.Property('width', width + 'px')
        tempSvg.attributes['height'] = new svg.Property('height', height + 'px')
        tempSvg.attributes['transform'] = new svg.Property(
          'transform',
          this.attribute('patternTransform').value
        )
        tempSvg.children = this.children

        var c = document.createElement('canvas')
        c.width = width
        c.height = height
        var cctx = c.getContext('2d')
        if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) {
          cctx.translate(
            this.attribute('x').toPixels('x', true),
            this.attribute('y').toPixels('y', true)
          )
        }
        // render 3x3 grid so when we transform there's no white space on edges
        for (var x = -1; x <= 1; x++) {
          for (var y = -1; y <= 1; y++) {
            cctx.save()
            tempSvg.attributes['x'] = new svg.Property('x', x * c.width)
            tempSvg.attributes['y'] = new svg.Property('y', y * c.height)
            tempSvg.render(cctx)
            cctx.restore()
          }
        }
        var pattern = ctx.createPattern(c, 'repeat')
        return pattern
      }
    }
    svg.Element.pattern.prototype = new svg.Element.ElementBase()

    // marker element
    svg.Element.marker = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.baseRender = this.render
      this.render = function (ctx, point, angle) {
        ctx.translate(point.x, point.y)
        if (this.attribute('orient').valueOrDefault('auto') == 'auto') {
          ctx.rotate(angle)
        }
        if (
          this.attribute('markerUnits').valueOrDefault('strokeWidth') ==
          'strokeWidth'
        ) {
          ctx.scale(ctx.lineWidth, ctx.lineWidth)
        }
        ctx.save()

        // render me using a temporary svg element
        var tempSvg = new svg.Element.svg()
        tempSvg.attributes['viewBox'] = new svg.Property(
          'viewBox',
          this.attribute('viewBox').value
        )
        tempSvg.attributes['refX'] = new svg.Property(
          'refX',
          this.attribute('refX').value
        )
        tempSvg.attributes['refY'] = new svg.Property(
          'refY',
          this.attribute('refY').value
        )
        tempSvg.attributes['width'] = new svg.Property(
          'width',
          this.attribute('markerWidth').value
        )
        tempSvg.attributes['height'] = new svg.Property(
          'height',
          this.attribute('markerHeight').value
        )
        tempSvg.attributes['fill'] = new svg.Property(
          'fill',
          this.attribute('fill').valueOrDefault('black')
        )
        tempSvg.attributes['stroke'] = new svg.Property(
          'stroke',
          this.attribute('stroke').valueOrDefault('none')
        )
        tempSvg.children = this.children
        tempSvg.render(ctx)

        ctx.restore()
        if (
          this.attribute('markerUnits').valueOrDefault('strokeWidth') ==
          'strokeWidth'
        ) {
          ctx.scale(1 / ctx.lineWidth, 1 / ctx.lineWidth)
        }
        if (this.attribute('orient').valueOrDefault('auto') == 'auto') {
          ctx.rotate(-angle)
        }
        ctx.translate(-point.x, -point.y)
      }
    }
    svg.Element.marker.prototype = new svg.Element.ElementBase()

    // definitions element
    svg.Element.defs = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.render = function (ctx) {
        // NOOP
      }
    }
    svg.Element.defs.prototype = new svg.Element.ElementBase()

    // base for gradients
    svg.Element.GradientBase = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.stops = []
      for (var i = 0; i < this.children.length; i++) {
        var child = this.children[i]
        if (child.type == 'stop') this.stops.push(child)
      }

      this.getGradient = function () {
        // OVERRIDE ME!
      }

      this.gradientUnits = function () {
        return this.attribute('gradientUnits').valueOrDefault(
          'objectBoundingBox'
        )
      }

      this.attributesToInherit = ['gradientUnits']

      this.inheritStopContainer = function (stopsContainer) {
        for (var i = 0; i < this.attributesToInherit.length; i++) {
          var attributeToInherit = this.attributesToInherit[i]
          if (
            !this.attribute(attributeToInherit).hasValue() &&
            stopsContainer.attribute(attributeToInherit).hasValue()
          ) {
            this.attribute(
              attributeToInherit,
              true
            ).value = stopsContainer.attribute(attributeToInherit).value
          }
        }
      }

      this.createGradient = function (ctx, element, parentOpacityProp) {
        var stopsContainer = this
        if (this.getHrefAttribute().hasValue()) {
          stopsContainer = this.getHrefAttribute().getDefinition()
          this.inheritStopContainer(stopsContainer)
        }

        var addParentOpacity = function (color) {
          if (parentOpacityProp.hasValue()) {
            var p = new svg.Property('color', color)
            return p.addOpacity(parentOpacityProp).value
          }
          return color
        }

        var g = this.getGradient(ctx, element)
        if (g == null) {
          return addParentOpacity(
            stopsContainer.stops[stopsContainer.stops.length - 1].color
          )
        }
        for (var i = 0; i < stopsContainer.stops.length; i++) {
          g.addColorStop(
            stopsContainer.stops[i].offset,
            addParentOpacity(stopsContainer.stops[i].color)
          )
        }

        if (this.attribute('gradientTransform').hasValue()) {
          // render as transformed pattern on temporary canvas
          var rootView = svg.ViewPort.viewPorts[0]

          var rect = new svg.Element.rect()
          rect.attributes['x'] = new svg.Property(
            'x',
            -svg.MAX_VIRTUAL_PIXELS / 3.0
          )
          rect.attributes['y'] = new svg.Property(
            'y',
            -svg.MAX_VIRTUAL_PIXELS / 3.0
          )
          rect.attributes['width'] = new svg.Property(
            'width',
            svg.MAX_VIRTUAL_PIXELS
          )
          rect.attributes['height'] = new svg.Property(
            'height',
            svg.MAX_VIRTUAL_PIXELS
          )

          var group = new svg.Element.g()
          group.attributes['transform'] = new svg.Property(
            'transform',
            this.attribute('gradientTransform').value
          )
          group.children = [rect]

          var tempSvg = new svg.Element.svg()
          tempSvg.attributes['x'] = new svg.Property('x', 0)
          tempSvg.attributes['y'] = new svg.Property('y', 0)
          tempSvg.attributes['width'] = new svg.Property(
            'width',
            rootView.width
          )
          tempSvg.attributes['height'] = new svg.Property(
            'height',
            rootView.height
          )
          tempSvg.children = [group]

          var c = document.createElement('canvas')
          c.width = rootView.width
          c.height = rootView.height
          var tempCtx = c.getContext('2d')
          tempCtx.fillStyle = g
          tempSvg.render(tempCtx)
          return tempCtx.createPattern(c, 'no-repeat')
        }

        return g
      }
    }
    svg.Element.GradientBase.prototype = new svg.Element.ElementBase()

    // linear gradient element
    svg.Element.linearGradient = function (node) {
      this.base = svg.Element.GradientBase
      this.base(node)

      this.attributesToInherit.push('x1')
      this.attributesToInherit.push('y1')
      this.attributesToInherit.push('x2')
      this.attributesToInherit.push('y2')

      this.getGradient = function (ctx, element) {
        var bb =
          this.gradientUnits() == 'objectBoundingBox'
            ? element.getBoundingBox()
            : null

        if (
          !this.attribute('x1').hasValue() &&
          !this.attribute('y1').hasValue() &&
          !this.attribute('x2').hasValue() &&
          !this.attribute('y2').hasValue()
        ) {
          this.attribute('x1', true).value = 0
          this.attribute('y1', true).value = 0
          this.attribute('x2', true).value = 1
          this.attribute('y2', true).value = 0
        }

        var x1 =
          this.gradientUnits() == 'objectBoundingBox'
            ? bb.x() + bb.width() * this.attribute('x1').numValue()
            : this.attribute('x1').toPixels('x')
        var y1 =
          this.gradientUnits() == 'objectBoundingBox'
            ? bb.y() + bb.height() * this.attribute('y1').numValue()
            : this.attribute('y1').toPixels('y')
        var x2 =
          this.gradientUnits() == 'objectBoundingBox'
            ? bb.x() + bb.width() * this.attribute('x2').numValue()
            : this.attribute('x2').toPixels('x')
        var y2 =
          this.gradientUnits() == 'objectBoundingBox'
            ? bb.y() + bb.height() * this.attribute('y2').numValue()
            : this.attribute('y2').toPixels('y')

        if (x1 == x2 && y1 == y2) return null
        return ctx.createLinearGradient(x1, y1, x2, y2)
      }
    }
    svg.Element.linearGradient.prototype = new svg.Element.GradientBase()

    // radial gradient element
    svg.Element.radialGradient = function (node) {
      this.base = svg.Element.GradientBase
      this.base(node)

      this.attributesToInherit.push('cx')
      this.attributesToInherit.push('cy')
      this.attributesToInherit.push('r')
      this.attributesToInherit.push('fx')
      this.attributesToInherit.push('fy')

      this.getGradient = function (ctx, element) {
        var bb = element.getBoundingBox()

        if (!this.attribute('cx').hasValue()) {
          this.attribute('cx', true).value = '50%'
        }
        if (!this.attribute('cy').hasValue()) {
          this.attribute('cy', true).value = '50%'
        }
        if (!this.attribute('r').hasValue()) {
          this.attribute('r', true).value = '50%'
        }

        var cx =
          this.gradientUnits() == 'objectBoundingBox'
            ? bb.x() + bb.width() * this.attribute('cx').numValue()
            : this.attribute('cx').toPixels('x')
        var cy =
          this.gradientUnits() == 'objectBoundingBox'
            ? bb.y() + bb.height() * this.attribute('cy').numValue()
            : this.attribute('cy').toPixels('y')

        var fx = cx
        var fy = cy
        if (this.attribute('fx').hasValue()) {
          fx =
            this.gradientUnits() == 'objectBoundingBox'
              ? bb.x() + bb.width() * this.attribute('fx').numValue()
              : this.attribute('fx').toPixels('x')
        }
        if (this.attribute('fy').hasValue()) {
          fy =
            this.gradientUnits() == 'objectBoundingBox'
              ? bb.y() + bb.height() * this.attribute('fy').numValue()
              : this.attribute('fy').toPixels('y')
        }

        var r =
          this.gradientUnits() == 'objectBoundingBox'
            ? (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue()
            : this.attribute('r').toPixels()

        return ctx.createRadialGradient(fx, fy, 0, cx, cy, r)
      }
    }
    svg.Element.radialGradient.prototype = new svg.Element.GradientBase()

    // gradient stop element
    svg.Element.stop = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.offset = this.attribute('offset').numValue()
      if (this.offset < 0) this.offset = 0
      if (this.offset > 1) this.offset = 1

      var stopColor = this.style('stop-color', true)
      if (stopColor.value === '') stopColor.value = '#000'
      if (this.style('stop-opacity').hasValue()) {
        stopColor = stopColor.addOpacity(this.style('stop-opacity'))
      }
      this.color = stopColor.value
    }
    svg.Element.stop.prototype = new svg.Element.ElementBase()

    // animation base element
    svg.Element.AnimateBase = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      svg.Animations.push(this)

      this.duration = 0.0
      this.begin = this.attribute('begin').toMilliseconds()
      this.maxDuration = this.begin + this.attribute('dur').toMilliseconds()

      this.getProperty = function () {
        var attributeType = this.attribute('attributeType').value
        var attributeName = this.attribute('attributeName').value

        if (attributeType == 'CSS') {
          return this.parent.style(attributeName, true)
        }
        return this.parent.attribute(attributeName, true)
      }

      this.initialValue = null
      this.initialUnits = ''
      this.removed = false

      this.calcValue = function () {
        // OVERRIDE ME!
        return ''
      }

      this.update = function (delta) {
        // set initial value
        if (this.initialValue == null) {
          this.initialValue = this.getProperty().value
          this.initialUnits = this.getProperty().getUnits()
        }

        // if we're past the end time
        if (this.duration > this.maxDuration) {
          // loop for indefinitely repeating animations
          if (
            this.attribute('repeatCount').value == 'indefinite' ||
            this.attribute('repeatDur').value == 'indefinite'
          ) {
            this.duration = 0.0
          } else if (
            this.attribute('fill').valueOrDefault('remove') == 'freeze' &&
            !this.frozen
          ) {
            this.frozen = true
            this.parent.animationFrozen = true
            this.parent.animationFrozenValue = this.getProperty().value
          } else if (
            this.attribute('fill').valueOrDefault('remove') == 'remove' &&
            !this.removed
          ) {
            this.removed = true
            this.getProperty().value = this.parent.animationFrozen
              ? this.parent.animationFrozenValue
              : this.initialValue
            return true
          }
          return false
        }
        this.duration = this.duration + delta

        // if we're past the begin time
        var updated = false
        if (this.begin < this.duration) {
          var newValue = this.calcValue() // tween

          if (this.attribute('type').hasValue()) {
            // for transform, etc.
            var type = this.attribute('type').value
            newValue = type + '(' + newValue + ')'
          }

          this.getProperty().value = newValue
          updated = true
        }

        return updated
      }

      this.from = this.attribute('from')
      this.to = this.attribute('to')
      this.values = this.attribute('values')
      if (this.values.hasValue()) {
        this.values.value = this.values.value.split(';')
      }

      // fraction of duration we've covered
      this.progress = function () {
        var ret = {
          progress:
            (this.duration - this.begin) / (this.maxDuration - this.begin)
        }
        if (this.values.hasValue()) {
          var p = ret.progress * (this.values.value.length - 1)
          var lb = Math.floor(p),
            ub = Math.ceil(p)
          ret.from = new svg.Property('from', parseFloat(this.values.value[lb]))
          ret.to = new svg.Property('to', parseFloat(this.values.value[ub]))
          ret.progress = (p - lb) / (ub - lb)
        } else {
          ret.from = this.from
          ret.to = this.to
        }
        return ret
      }
    }
    svg.Element.AnimateBase.prototype = new svg.Element.ElementBase()

    // animate element
    svg.Element.animate = function (node) {
      this.base = svg.Element.AnimateBase
      this.base(node)

      this.calcValue = function () {
        var p = this.progress()

        // tween value linearly
        var newValue =
          p.from.numValue() + (p.to.numValue() - p.from.numValue()) * p.progress
        return newValue + this.initialUnits
      }
    }
    svg.Element.animate.prototype = new svg.Element.AnimateBase()

    // animate color element
    svg.Element.animateColor = function (node) {
      this.base = svg.Element.AnimateBase
      this.base(node)

      this.calcValue = function () {
        var p = this.progress()
        var from = new RGBColor(p.from.value)
        var to = new RGBColor(p.to.value)

        if (from.ok && to.ok) {
          // tween color linearly
          var r = from.r + (to.r - from.r) * p.progress
          var g = from.g + (to.g - from.g) * p.progress
          var b = from.b + (to.b - from.b) * p.progress
          return (
            'rgb(' +
            parseInt(r, 10) +
            ',' +
            parseInt(g, 10) +
            ',' +
            parseInt(b, 10) +
            ')'
          )
        }
        return this.attribute('from').value
      }
    }
    svg.Element.animateColor.prototype = new svg.Element.AnimateBase()

    // animate transform element
    svg.Element.animateTransform = function (node) {
      this.base = svg.Element.AnimateBase
      this.base(node)

      this.calcValue = function () {
        var p = this.progress()

        // tween value linearly
        var from = svg.ToNumberArray(p.from.value)
        var to = svg.ToNumberArray(p.to.value)
        var newValue = ''
        for (var i = 0; i < from.length; i++) {
          newValue += from[i] + (to[i] - from[i]) * p.progress + ' '
        }
        return newValue
      }
    }
    svg.Element.animateTransform.prototype = new svg.Element.animate()

    // font element
    svg.Element.font = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.horizAdvX = this.attribute('horiz-adv-x').numValue()

      this.isRTL = false
      this.isArabic = false
      this.fontFace = null
      this.missingGlyph = null
      this.glyphs = []
      for (var i = 0; i < this.children.length; i++) {
        var child = this.children[i]
        if (child.type == 'font-face') {
          this.fontFace = child
          if (child.style('font-family').hasValue()) {
            svg.Definitions[child.style('font-family').value] = this
          }
        } else if (child.type == 'missing-glyph') this.missingGlyph = child
        else if (child.type == 'glyph') {
          if (child.arabicForm != '') {
            this.isRTL = true
            this.isArabic = true
            if (typeof this.glyphs[child.unicode] === 'undefined') {
              this.glyphs[child.unicode] = []
            }
            this.glyphs[child.unicode][child.arabicForm] = child
          } else {
            this.glyphs[child.unicode] = child
          }
        }
      }
    }
    svg.Element.font.prototype = new svg.Element.ElementBase()

    // font-face element
    svg.Element.fontface = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.ascent = this.attribute('ascent').value
      this.descent = this.attribute('descent').value
      this.unitsPerEm = this.attribute('units-per-em').numValue()
    }
    svg.Element.fontface.prototype = new svg.Element.ElementBase()

    // missing-glyph element
    svg.Element.missingglyph = function (node) {
      this.base = svg.Element.path
      this.base(node)

      this.horizAdvX = 0
    }
    svg.Element.missingglyph.prototype = new svg.Element.path()

    // glyph element
    svg.Element.glyph = function (node) {
      this.base = svg.Element.path
      this.base(node)

      this.horizAdvX = this.attribute('horiz-adv-x').numValue()
      this.unicode = this.attribute('unicode').value
      this.arabicForm = this.attribute('arabic-form').value
    }
    svg.Element.glyph.prototype = new svg.Element.path()

    // text element
    svg.Element.text = function (node) {
      this.captureTextNodes = true
      this.base = svg.Element.RenderedElementBase
      this.base(node)

      this.baseSetContext = this.setContext
      this.setContext = function (ctx) {
        this.baseSetContext(ctx)

        var textBaseline = this.style('dominant-baseline').toTextBaseline()
        if (textBaseline == null) {
          textBaseline = this.style('alignment-baseline').toTextBaseline()
        }
        if (textBaseline != null) ctx.textBaseline = textBaseline
      }

      this.getBoundingBox = function () {
        var x = this.attribute('x').toPixels('x')
        var y = this.attribute('y').toPixels('y')
        var fontSize = this.parent
          .style('font-size')
          .numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize)
        return new svg.BoundingBox(
          x,
          y - fontSize,
          x +
            Math.floor(fontSize * 2.0 / 3.0) *
              this.children[0].getText().length,
          y
        )
      }

      this.renderChildren = function (ctx) {
        this.x = this.attribute('x').toPixels('x')
        this.y = this.attribute('y').toPixels('y')
        if (this.attribute('dx').hasValue()) {
          this.x += this.attribute('dx').toPixels('x')
        }
        if (this.attribute('dy').hasValue()) {
          this.y += this.attribute('dy').toPixels('y')
        }
        this.x += this.getAnchorDelta(ctx, this, 0)
        for (var i = 0; i < this.children.length; i++) {
          this.renderChild(ctx, this, i)
        }
      }

      this.getAnchorDelta = function (ctx, parent, startI) {
        var textAnchor = this.style('text-anchor').valueOrDefault('start')
        if (textAnchor != 'start') {
          var width = 0
          for (var i = startI; i < parent.children.length; i++) {
            var child = parent.children[i]
            if (i > startI && child.attribute('x').hasValue()) break // new group
            width += child.measureTextRecursive(ctx)
          }
          return -1 * (textAnchor == 'end' ? width : width / 2.0)
        }
        return 0
      }

      this.renderChild = function (ctx, parent, i) {
        var child = parent.children[i]
        if (child.attribute('x').hasValue()) {
          child.x =
            child.attribute('x').toPixels('x') +
            parent.getAnchorDelta(ctx, parent, i)
          if (child.attribute('dx').hasValue()) {
            child.x += child.attribute('dx').toPixels('x')
          }
        } else {
          if (child.attribute('dx').hasValue()) {
            parent.x += child.attribute('dx').toPixels('x')
          }
          child.x = parent.x
        }
        parent.x = child.x + child.measureText(ctx)

        if (child.attribute('y').hasValue()) {
          child.y = child.attribute('y').toPixels('y')
          if (child.attribute('dy').hasValue()) {
            child.y += child.attribute('dy').toPixels('y')
          }
        } else {
          if (child.attribute('dy').hasValue()) {
            parent.y += child.attribute('dy').toPixels('y')
          }
          child.y = parent.y
        }
        parent.y = child.y

        child.render(ctx)

        for (var i = 0; i < child.children.length; i++) {
          parent.renderChild(ctx, child, i)
        }
      }
    }
    svg.Element.text.prototype = new svg.Element.RenderedElementBase()

    // text base
    svg.Element.TextElementBase = function (node) {
      this.base = svg.Element.RenderedElementBase
      this.base(node)

      this.getGlyph = function (font, text, i) {
        var c = text[i]
        var glyph = null
        if (font.isArabic) {
          var arabicForm = 'isolated'
          if (
            (i == 0 || text[i - 1] == ' ') &&
            i < text.length - 2 &&
            text[i + 1] != ' '
          ) {
            arabicForm = 'terminal'
          }
          if (
            i > 0 &&
            text[i - 1] != ' ' &&
            i < text.length - 2 &&
            text[i + 1] != ' '
          ) {
            arabicForm = 'medial'
          }
          if (
            i > 0 &&
            text[i - 1] != ' ' &&
            (i == text.length - 1 || text[i + 1] == ' ')
          ) {
            arabicForm = 'initial'
          }
          if (typeof font.glyphs[c] !== 'undefined') {
            glyph = font.glyphs[c][arabicForm]
            if (glyph == null && font.glyphs[c].type == 'glyph') {
              glyph = font.glyphs[c]
            }
          }
        } else {
          glyph = font.glyphs[c]
        }
        if (glyph == null) glyph = font.missingGlyph
        return glyph
      }

      this.renderChildren = function (ctx) {
        var customFont = this.parent.style('font-family').getDefinition()
        if (customFont != null) {
          var fontSize = this.parent
            .style('font-size')
            .numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize)
          var fontStyle = this.parent
            .style('font-style')
            .valueOrDefault(svg.Font.Parse(svg.ctx.font).fontStyle)
          var text = this.getText()
          if (customFont.isRTL) text = text.split('').reverse().join('')

          var dx = svg.ToNumberArray(this.parent.attribute('dx').value)
          for (var i = 0; i < text.length; i++) {
            var glyph = this.getGlyph(customFont, text, i)
            var scale = fontSize / customFont.fontFace.unitsPerEm
            ctx.translate(this.x, this.y)
            ctx.scale(scale, -scale)
            var lw = ctx.lineWidth
            ctx.lineWidth =
              ctx.lineWidth * customFont.fontFace.unitsPerEm / fontSize
            if (fontStyle == 'italic') ctx.transform(1, 0, 0.4, 1, 0, 0)
            glyph.render(ctx)
            if (fontStyle == 'italic') ctx.transform(1, 0, -0.4, 1, 0, 0)
            ctx.lineWidth = lw
            ctx.scale(1 / scale, -1 / scale)
            ctx.translate(-this.x, -this.y)

            this.x +=
              fontSize *
              (glyph.horizAdvX || customFont.horizAdvX) /
              customFont.fontFace.unitsPerEm
            if (typeof dx[i] !== 'undefined' && !isNaN(dx[i])) {
              this.x += dx[i]
            }
          }
          return
        }

        if (ctx.fillStyle != '') {
          ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y)
        }
        if (ctx.strokeStyle != '') {
          ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y)
        }
      }

      this.getText = function () {
        // OVERRIDE ME
      }

      this.measureTextRecursive = function (ctx) {
        var width = this.measureText(ctx)
        for (var i = 0; i < this.children.length; i++) {
          width += this.children[i].measureTextRecursive(ctx)
        }
        return width
      }

      this.measureText = function (ctx) {
        var customFont = this.parent.style('font-family').getDefinition()
        if (customFont != null) {
          var fontSize = this.parent
            .style('font-size')
            .numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize)
          var measure = 0
          var text = this.getText()
          if (customFont.isRTL) text = text.split('').reverse().join('')
          var dx = svg.ToNumberArray(this.parent.attribute('dx').value)
          for (var i = 0; i < text.length; i++) {
            var glyph = this.getGlyph(customFont, text, i)
            measure +=
              (glyph.horizAdvX || customFont.horizAdvX) *
              fontSize /
              customFont.fontFace.unitsPerEm
            if (typeof dx[i] !== 'undefined' && !isNaN(dx[i])) {
              measure += dx[i]
            }
          }
          return measure
        }

        var textToMeasure = svg.compressSpaces(this.getText())
        if (!ctx.measureText) return textToMeasure.length * 10

        ctx.save()
        this.setContext(ctx)
        var width = ctx.measureText(textToMeasure).width
        ctx.restore()
        return width
      }
    }
    svg.Element.TextElementBase.prototype = new svg.Element
      .RenderedElementBase()

    // tspan
    svg.Element.tspan = function (node) {
      this.captureTextNodes = true
      this.base = svg.Element.TextElementBase
      this.base(node)

      this.text = svg.compressSpaces(
        node.value || node.text || node.textContent || ''
      )
      this.getText = function () {
        // if this node has children, then they own the text
        if (this.children.length > 0) {
          return ''
        }
        return this.text
      }
    }
    svg.Element.tspan.prototype = new svg.Element.TextElementBase()

    // tref
    svg.Element.tref = function (node) {
      this.base = svg.Element.TextElementBase
      this.base(node)

      this.getText = function () {
        var element = this.getHrefAttribute().getDefinition()
        if (element != null) return element.children[0].getText()
      }
    }
    svg.Element.tref.prototype = new svg.Element.TextElementBase()

    // a element
    svg.Element.a = function (node) {
      this.base = svg.Element.TextElementBase
      this.base(node)

      this.hasText = node.childNodes.length > 0
      for (var i = 0; i < node.childNodes.length; i++) {
        if (node.childNodes[i].nodeType != 3) this.hasText = false
      }

      // this might contain text
      this.text = this.hasText ? node.childNodes[0].value : ''
      this.getText = function () {
        return this.text
      }

      this.baseRenderChildren = this.renderChildren
      this.renderChildren = function (ctx) {
        if (this.hasText) {
          // render as text element
          this.baseRenderChildren(ctx)
          var fontSize = new svg.Property(
            'fontSize',
            svg.Font.Parse(svg.ctx.font).fontSize
          )
          svg.Mouse.checkBoundingBox(
            this,
            new svg.BoundingBox(
              this.x,
              this.y - fontSize.toPixels('y'),
              this.x + this.measureText(ctx),
              this.y
            )
          )
        } else if (this.children.length > 0) {
          // render as temporary group
          var g = new svg.Element.g()
          g.children = this.children
          g.parent = this
          g.render(ctx)
        }
      }

      this.onclick = function () {
        window.open(this.getHrefAttribute().value)
      }

      this.onmousemove = function () {
        svg.ctx.canvas.style.cursor = 'pointer'
      }
    }
    svg.Element.a.prototype = new svg.Element.TextElementBase()

    // image element
    svg.Element.image = function (node) {
      this.base = svg.Element.RenderedElementBase
      this.base(node)

      var href = this.getHrefAttribute().value
      if (href == '') {
        return
      }
      var isSvg = href.match(/\.svg$/)

      svg.Images.push(this)
      this.loaded = false
      if (!isSvg) {
        this.img = document.createElement('img')
        if (svg.opts['useCORS'] == true) {
          this.img.crossOrigin = 'Anonymous'
        }
        var self = this
        this.img.onload = function () {
          self.loaded = true
        }
        this.img.onerror = function () {
          svg.log('ERROR: image "' + href + '" not found')
          self.loaded = true
        }
        this.img.src = href
      } else {
        this.img = svg.ajax(href)
        this.loaded = true
      }

      this.renderChildren = function (ctx) {
        var x = this.attribute('x').toPixels('x')
        var y = this.attribute('y').toPixels('y')

        var width = this.attribute('width').toPixels('x')
        var height = this.attribute('height').toPixels('y')
        if (width == 0 || height == 0) return

        ctx.save()
        if (isSvg) {
          ctx.drawSvg(this.img, x, y, width, height)
        } else {
          ctx.translate(x, y)
          svg.AspectRatio(
            ctx,
            this.attribute('preserveAspectRatio').value,
            width,
            this.img.width,
            height,
            this.img.height,
            0,
            0
          )
          ctx.drawImage(this.img, 0, 0)
        }
        ctx.restore()
      }

      this.getBoundingBox = function () {
        var x = this.attribute('x').toPixels('x')
        var y = this.attribute('y').toPixels('y')
        var width = this.attribute('width').toPixels('x')
        var height = this.attribute('height').toPixels('y')
        return new svg.BoundingBox(x, y, x + width, y + height)
      }
    }
    svg.Element.image.prototype = new svg.Element.RenderedElementBase()

    // group element
    svg.Element.g = function (node) {
      this.base = svg.Element.RenderedElementBase
      this.base(node)

      this.getBoundingBox = function () {
        var bb = new svg.BoundingBox()
        for (var i = 0; i < this.children.length; i++) {
          bb.addBoundingBox(this.children[i].getBoundingBox())
        }
        return bb
      }
    }
    svg.Element.g.prototype = new svg.Element.RenderedElementBase()

    // symbol element
    svg.Element.symbol = function (node) {
      this.base = svg.Element.RenderedElementBase
      this.base(node)

      this.render = function (ctx) {
        // NO RENDER
      }
    }
    svg.Element.symbol.prototype = new svg.Element.RenderedElementBase()

    // style element
    svg.Element.style = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      // text, or spaces then CDATA
      var css = ''
      for (var i = 0; i < node.childNodes.length; i++) {
        css += node.childNodes[i].data
      }
      css = css.replace(
        /(\/\*([^*]|[\r\n]|(\*+([^*\/]|[\r\n])))*\*+\/)|(^[\s]*\/\/.*)/gm,
        ''
      ) // remove comments
      css = svg.compressSpaces(css) // replace whitespace
      var cssDefs = css.split('}')
      for (var i = 0; i < cssDefs.length; i++) {
        if (svg.trim(cssDefs[i]) != '') {
          var cssDef = cssDefs[i].split('{')
          var cssClasses = cssDef[0].split(',')
          var cssProps = cssDef[1].split(';')
          for (var j = 0; j < cssClasses.length; j++) {
            var cssClass = svg.trim(cssClasses[j])
            if (cssClass != '') {
              var props = {}
              for (var k = 0; k < cssProps.length; k++) {
                var prop = cssProps[k].indexOf(':')
                var name = cssProps[k].substr(0, prop)
                var value = cssProps[k].substr(
                  prop + 1,
                  cssProps[k].length - prop
                )
                if (name != null && value != null) {
                  props[svg.trim(name)] = new svg.Property(
                    svg.trim(name),
                    svg.trim(value)
                  )
                }
              }
              svg.Styles[cssClass] = props
              svg.StylesSpecificity[cssClass] = getSelectorSpecificity(cssClass)
              if (cssClass == '@font-face') {
                var fontFamily = props['font-family'].value.replace(/"/g, '')
                var srcs = props['src'].value.split(',')
                for (var s = 0; s < srcs.length; s++) {
                  if (srcs[s].indexOf('format("svg")') > 0) {
                    var urlStart = srcs[s].indexOf('url')
                    var urlEnd = srcs[s].indexOf(')', urlStart)
                    var url = srcs[s].substr(
                      urlStart + 5,
                      urlEnd - urlStart - 6
                    )
                    var doc = svg.parseXml(svg.ajax(url))
                    var fonts = doc.getElementsByTagName('font')
                    for (var f = 0; f < fonts.length; f++) {
                      var font = svg.CreateElement(fonts[f])
                      svg.Definitions[fontFamily] = font
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
    svg.Element.style.prototype = new svg.Element.ElementBase()

    // use element
    svg.Element.use = function (node) {
      this.base = svg.Element.RenderedElementBase
      this.base(node)

      this.baseSetContext = this.setContext
      this.setContext = function (ctx) {
        this.baseSetContext(ctx)
        if (this.attribute('x').hasValue()) {
          ctx.translate(this.attribute('x').toPixels('x'), 0)
        }
        if (this.attribute('y').hasValue()) {
          ctx.translate(0, this.attribute('y').toPixels('y'))
        }
      }

      var element = this.getHrefAttribute().getDefinition()

      this.path = function (ctx) {
        if (element != null) element.path(ctx)
      }

      this.getBoundingBox = function () {
        if (element != null) return element.getBoundingBox()
      }

      this.renderChildren = function (ctx) {
        if (element != null) {
          var tempSvg = element
          if (element.type == 'symbol') {
            // render me using a temporary svg element in symbol cases (http://www.w3.org/TR/SVG/struct.html#UseElement)
            tempSvg = new svg.Element.svg()
            tempSvg.type = 'svg'
            tempSvg.attributes['viewBox'] = new svg.Property(
              'viewBox',
              element.attribute('viewBox').value
            )
            tempSvg.attributes['preserveAspectRatio'] = new svg.Property(
              'preserveAspectRatio',
              element.attribute('preserveAspectRatio').value
            )
            tempSvg.attributes['overflow'] = new svg.Property(
              'overflow',
              element.attribute('overflow').value
            )
            tempSvg.children = element.children
          }
          if (tempSvg.type == 'svg') {
            // if symbol or svg, inherit width/height from me
            if (this.attribute('width').hasValue()) {
              tempSvg.attributes['width'] = new svg.Property(
                'width',
                this.attribute('width').value
              )
            }
            if (this.attribute('height').hasValue()) {
              tempSvg.attributes['height'] = new svg.Property(
                'height',
                this.attribute('height').value
              )
            }
          }
          var oldParent = tempSvg.parent
          tempSvg.parent = null
          tempSvg.render(ctx)
          tempSvg.parent = oldParent
        }
      }
    }
    svg.Element.use.prototype = new svg.Element.RenderedElementBase()

    // mask element
    svg.Element.mask = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.apply = function (ctx, element) {
        // render as temp svg
        var x = this.attribute('x').toPixels('x')
        var y = this.attribute('y').toPixels('y')
        var width = this.attribute('width').toPixels('x')
        var height = this.attribute('height').toPixels('y')

        if (width == 0 && height == 0) {
          var bb = new svg.BoundingBox()
          for (var i = 0; i < this.children.length; i++) {
            bb.addBoundingBox(this.children[i].getBoundingBox())
          }
          var x = Math.floor(bb.x1)
          var y = Math.floor(bb.y1)
          var width = Math.floor(bb.width())
          var height = Math.floor(bb.height())
        }

        // temporarily remove mask to avoid recursion
        var mask = element.attribute('mask').value
        element.attribute('mask').value = ''

        var cMask = document.createElement('canvas')
        cMask.width = x + width
        cMask.height = y + height
        var maskCtx = cMask.getContext('2d')
        this.renderChildren(maskCtx)

        var c = document.createElement('canvas')
        c.width = x + width
        c.height = y + height
        var tempCtx = c.getContext('2d')
        element.render(tempCtx)
        tempCtx.globalCompositeOperation = 'destination-in'
        tempCtx.fillStyle = maskCtx.createPattern(cMask, 'no-repeat')
        tempCtx.fillRect(0, 0, x + width, y + height)

        ctx.fillStyle = tempCtx.createPattern(c, 'no-repeat')
        ctx.fillRect(0, 0, x + width, y + height)

        // reassign mask
        element.attribute('mask').value = mask
      }

      this.render = function (ctx) {
        // NO RENDER
      }
    }
    svg.Element.mask.prototype = new svg.Element.ElementBase()

    // clip element
    svg.Element.clipPath = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.apply = function (ctx) {
        var oldBeginPath = CanvasRenderingContext2D.prototype.beginPath
        CanvasRenderingContext2D.prototype.beginPath = function () {}

        var oldClosePath = CanvasRenderingContext2D.prototype.closePath
        CanvasRenderingContext2D.prototype.closePath = function () {}

        oldBeginPath.call(ctx)
        for (var i = 0; i < this.children.length; i++) {
          var child = this.children[i]
          if (typeof child.path !== 'undefined') {
            var transform = null
            if (child.style('transform', false, true).hasValue()) {
              transform = new svg.Transform(
                child.style('transform', false, true).value
              )
              transform.apply(ctx)
            }
            child.path(ctx)
            CanvasRenderingContext2D.prototype.closePath = oldClosePath
            if (transform) {
              transform.unapply(ctx)
            }
          }
        }
        oldClosePath.call(ctx)
        ctx.clip()

        CanvasRenderingContext2D.prototype.beginPath = oldBeginPath
        CanvasRenderingContext2D.prototype.closePath = oldClosePath
      }

      this.render = function (ctx) {
        // NO RENDER
      }
    }
    svg.Element.clipPath.prototype = new svg.Element.ElementBase()

    // filters
    svg.Element.filter = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.apply = function (ctx, element) {
        // render as temp svg
        var bb = element.getBoundingBox()
        var x = Math.floor(bb.x1)
        var y = Math.floor(bb.y1)
        var width = Math.floor(bb.width())
        var height = Math.floor(bb.height())

        // temporarily remove filter to avoid recursion
        var filter = element.style('filter').value
        element.style('filter').value = ''

        var px = 0,
          py = 0
        for (var i = 0; i < this.children.length; i++) {
          var efd = this.children[i].extraFilterDistance || 0
          px = Math.max(px, efd)
          py = Math.max(py, efd)
        }

        var c = document.createElement('canvas')
        c.width = width + 2 * px
        c.height = height + 2 * py
        var tempCtx = c.getContext('2d')
        tempCtx.translate(-x + px, -y + py)
        element.render(tempCtx)

        // apply filters
        for (var i = 0; i < this.children.length; i++) {
          if (typeof this.children[i].apply === 'function') {
            this.children[i].apply(
              tempCtx,
              0,
              0,
              width + 2 * px,
              height + 2 * py
            )
          }
        }

        // render on me
        ctx.drawImage(
          c,
          0,
          0,
          width + 2 * px,
          height + 2 * py,
          x - px,
          y - py,
          width + 2 * px,
          height + 2 * py
        )

        // reassign filter
        element.style('filter', true).value = filter
      }

      this.render = function (ctx) {
        // NO RENDER
      }
    }
    svg.Element.filter.prototype = new svg.Element.ElementBase()

    svg.Element.feMorphology = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.apply = function (ctx, x, y, width, height) {
        // TODO: implement
      }
    }
    svg.Element.feMorphology.prototype = new svg.Element.ElementBase()

    svg.Element.feComposite = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.apply = function (ctx, x, y, width, height) {
        // TODO: implement
      }
    }
    svg.Element.feComposite.prototype = new svg.Element.ElementBase()

    svg.Element.feColorMatrix = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      var matrix = svg.ToNumberArray(this.attribute('values').value)
      switch (this.attribute('type').valueOrDefault('matrix')) { // http://www.w3.org/TR/SVG/filters.html#feColorMatrixElement
        case 'saturate':
          var s = matrix[0]
          matrix = [
            0.213 + 0.787 * s,
            0.715 - 0.715 * s,
            0.072 - 0.072 * s,
            0,
            0,
            0.213 - 0.213 * s,
            0.715 + 0.285 * s,
            0.072 - 0.072 * s,
            0,
            0,
            0.213 - 0.213 * s,
            0.715 - 0.715 * s,
            0.072 + 0.928 * s,
            0,
            0,
            0,
            0,
            0,
            1,
            0,
            0,
            0,
            0,
            0,
            1
          ]
          break
        case 'hueRotate':
          var a = matrix[0] * Math.PI / 180.0
          var c = function (m1, m2, m3) {
            return m1 + Math.cos(a) * m2 + Math.sin(a) * m3
          }
          matrix = [
            c(0.213, 0.787, -0.213),
            c(0.715, -0.715, -0.715),
            c(0.072, -0.072, 0.928),
            0,
            0,
            c(0.213, -0.213, 0.143),
            c(0.715, 0.285, 0.14),
            c(0.072, -0.072, -0.283),
            0,
            0,
            c(0.213, -0.213, -0.787),
            c(0.715, -0.715, 0.715),
            c(0.072, 0.928, 0.072),
            0,
            0,
            0,
            0,
            0,
            1,
            0,
            0,
            0,
            0,
            0,
            1
          ]
          break
        case 'luminanceToAlpha':
          matrix = [
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0.2125,
            0.7154,
            0.0721,
            0,
            0,
            0,
            0,
            0,
            0,
            1
          ]
          break
      }

      function imGet (img, x, y, width, height, rgba) {
        return img[y * width * 4 + x * 4 + rgba]
      }

      function imSet (img, x, y, width, height, rgba, val) {
        img[y * width * 4 + x * 4 + rgba] = val
      }

      function m (i, v) {
        var mi = matrix[i]
        return mi * (mi < 0 ? v - 255 : v)
      }

      this.apply = function (ctx, x, y, width, height) {
        // assuming x==0 && y==0 for now
        var srcData = ctx.getImageData(0, 0, width, height)
        for (var y = 0; y < height; y++) {
          for (var x = 0; x < width; x++) {
            var r = imGet(srcData.data, x, y, width, height, 0)
            var g = imGet(srcData.data, x, y, width, height, 1)
            var b = imGet(srcData.data, x, y, width, height, 2)
            var a = imGet(srcData.data, x, y, width, height, 3)
            imSet(
              srcData.data,
              x,
              y,
              width,
              height,
              0,
              m(0, r) + m(1, g) + m(2, b) + m(3, a) + m(4, 1)
            )
            imSet(
              srcData.data,
              x,
              y,
              width,
              height,
              1,
              m(5, r) + m(6, g) + m(7, b) + m(8, a) + m(9, 1)
            )
            imSet(
              srcData.data,
              x,
              y,
              width,
              height,
              2,
              m(10, r) + m(11, g) + m(12, b) + m(13, a) + m(14, 1)
            )
            imSet(
              srcData.data,
              x,
              y,
              width,
              height,
              3,
              m(15, r) + m(16, g) + m(17, b) + m(18, a) + m(19, 1)
            )
          }
        }
        ctx.clearRect(0, 0, width, height)
        ctx.putImageData(srcData, 0, 0)
      }
    }
    svg.Element.feColorMatrix.prototype = new svg.Element.ElementBase()

    svg.Element.feGaussianBlur = function (node) {
      this.base = svg.Element.ElementBase
      this.base(node)

      this.blurRadius = Math.floor(this.attribute('stdDeviation').numValue())
      this.extraFilterDistance = this.blurRadius

      this.apply = function (ctx, x, y, width, height) {
        if (typeof stackBlurCanvasRGBA === 'undefined') {
          svg.log('ERROR: StackBlur.js must be included for blur to work')
          return
        }

        // StackBlur requires canvas be on document
        ctx.canvas.id = svg.UniqueId()
        ctx.canvas.style.display = 'none'
        document.body.appendChild(ctx.canvas)
        stackBlurCanvasRGBA(ctx.canvas.id, x, y, width, height, this.blurRadius)
        document.body.removeChild(ctx.canvas)
      }
    }
    svg.Element.feGaussianBlur.prototype = new svg.Element.ElementBase()

    // title element, do nothing
    svg.Element.title = function (node) {}
    svg.Element.title.prototype = new svg.Element.ElementBase()

    // desc element, do nothing
    svg.Element.desc = function (node) {}
    svg.Element.desc.prototype = new svg.Element.ElementBase()

    svg.Element.MISSING = function (node) {
      svg.log("ERROR: Element '" + node.nodeName + "' not yet implemented.")
    }
    svg.Element.MISSING.prototype = new svg.Element.ElementBase()

    // element factory
    svg.CreateElement = function (node) {
      var className = node.nodeName.replace(/^[^:]+:/, '') // remove namespace
      className = className.replace(/\-/g, '') // remove dashes
      var e = null
      if (typeof svg.Element[className] !== 'undefined') {
        e = new svg.Element[className](node)
      } else {
        e = new svg.Element.MISSING(node)
      }

      e.type = node.nodeName
      return e
    }

    // load from url
    svg.load = function (ctx, url) {
      svg.loadXml(ctx, svg.ajax(url))
    }

    // load from xml
    svg.loadXml = function (ctx, xml) {
      svg.loadXmlDoc(ctx, svg.parseXml(xml))
    }

    svg.loadXmlDoc = function (ctx, dom) {
      svg.init(ctx)

      var mapXY = function (p) {
        var e = ctx.canvas
        while (e) {
          p.x -= e.offsetLeft
          p.y -= e.offsetTop
          e = e.offsetParent
        }
        if (window.scrollX) p.x += window.scrollX
        if (window.scrollY) p.y += window.scrollY
        return p
      }

      // bind mouse
      if (svg.opts['ignoreMouse'] != true) {
        ctx.canvas.onclick = function (e) {
          var p = mapXY(
            new svg.Point(
              e != null ? e.clientX : event.clientX,
              e != null ? e.clientY : event.clientY
            )
          )
          svg.Mouse.onclick(p.x, p.y)
        }
        ctx.canvas.onmousemove = function (e) {
          var p = mapXY(
            new svg.Point(
              e != null ? e.clientX : event.clientX,
              e != null ? e.clientY : event.clientY
            )
          )
          svg.Mouse.onmousemove(p.x, p.y)
        }
      }

      var e = svg.CreateElement(dom.documentElement)
      e.root = true
      e.addStylesFromStyleDefinition()

      // render loop
      var isFirstRender = true
      var draw = function () {
        svg.ViewPort.Clear()
        if (ctx.canvas.parentNode) {
          svg.ViewPort.SetCurrent(
            ctx.canvas.parentNode.clientWidth,
            ctx.canvas.parentNode.clientHeight
          )
        }

        if (svg.opts['ignoreDimensions'] != true) {
          // set canvas size
          if (e.style('width').hasValue()) {
            ctx.canvas.width = e.style('width').toPixels('x')
            ctx.canvas.style.width = ctx.canvas.width + 'px'
          }
          if (e.style('height').hasValue()) {
            ctx.canvas.height = e.style('height').toPixels('y')
            ctx.canvas.style.height = ctx.canvas.height + 'px'
          }
        }
        var cWidth = ctx.canvas.clientWidth || ctx.canvas.width
        var cHeight = ctx.canvas.clientHeight || ctx.canvas.height
        if (
          svg.opts['ignoreDimensions'] == true &&
          e.style('width').hasValue() &&
          e.style('height').hasValue()
        ) {
          cWidth = e.style('width').toPixels('x')
          cHeight = e.style('height').toPixels('y')
        }
        svg.ViewPort.SetCurrent(cWidth, cHeight)

        if (svg.opts['offsetX'] != null) {
          e.attribute('x', true).value = svg.opts['offsetX']
        }
        if (svg.opts['offsetY'] != null) {
          e.attribute('y', true).value = svg.opts['offsetY']
        }
        if (svg.opts['scaleWidth'] != null || svg.opts['scaleHeight'] != null) {
          var xRatio = null,
            yRatio = null,
            viewBox = svg.ToNumberArray(e.attribute('viewBox').value)

          if (svg.opts['scaleWidth'] != null) {
            if (e.attribute('width').hasValue()) {
              xRatio =
                e.attribute('width').toPixels('x') / svg.opts['scaleWidth']
            } else if (!isNaN(viewBox[2])) {
              xRatio = viewBox[2] / svg.opts['scaleWidth']
            }
          }

          if (svg.opts['scaleHeight'] != null) {
            if (e.attribute('height').hasValue()) {
              yRatio =
                e.attribute('height').toPixels('y') / svg.opts['scaleHeight']
            } else if (!isNaN(viewBox[3])) {
              yRatio = viewBox[3] / svg.opts['scaleHeight']
            }
          }

          if (xRatio == null) {
            xRatio = yRatio
          }
          if (yRatio == null) {
            yRatio = xRatio
          }

          e.attribute('width', true).value = svg.opts['scaleWidth']
          e.attribute('height', true).value = svg.opts['scaleHeight']
          e.style('transform', true, true).value +=
            ' scale(' + 1.0 / xRatio + ',' + 1.0 / yRatio + ')'
        }

        // clear and render
        if (svg.opts['ignoreClear'] != true) {
          ctx.clearRect(0, 0, cWidth, cHeight)
        }
        e.render(ctx)
        if (isFirstRender) {
          isFirstRender = false
          if (typeof svg.opts['renderCallback'] === 'function') {
            svg.opts['renderCallback'](dom)
          }
        }
      }

      var waitingForImages = true
      if (svg.ImagesLoaded()) {
        waitingForImages = false
        draw()
      }
      svg.intervalID = setInterval(function () {
        var needUpdate = false

        if (waitingForImages && svg.ImagesLoaded()) {
          waitingForImages = false
          needUpdate = true
        }

        // need update from mouse events?
        if (svg.opts['ignoreMouse'] != true) {
          needUpdate = needUpdate | svg.Mouse.hasEvents()
        }

        // need update from animations?
        if (svg.opts['ignoreAnimation'] != true) {
          for (var i = 0; i < svg.Animations.length; i++) {
            needUpdate =
              needUpdate | svg.Animations[i].update(1000 / svg.FRAMERATE)
          }
        }

        // need update from redraw?
        if (typeof svg.opts['forceRedraw'] === 'function') {
          if (svg.opts['forceRedraw']() == true) needUpdate = true
        }

        // render if needed
        if (needUpdate) {
          draw()
          svg.Mouse.runEvents() // run and clear our events
        }
      }, 1000 / svg.FRAMERATE)
    }

    svg.stop = function () {
      if (svg.intervalID) {
        clearInterval(svg.intervalID)
      }
    }

    svg.Mouse = new function () {
      this.events = []
      this.hasEvents = function () {
        return this.events.length != 0
      }

      this.onclick = function (x, y) {
        this.events.push({
          type: 'onclick',
          x: x,
          y: y,
          run: function (e) {
            if (e.onclick) e.onclick()
          }
        })
      }

      this.onmousemove = function (x, y) {
        this.events.push({
          type: 'onmousemove',
          x: x,
          y: y,
          run: function (e) {
            if (e.onmousemove) e.onmousemove()
          }
        })
      }

      this.eventElements = []

      this.checkPath = function (element, ctx) {
        for (var i = 0; i < this.events.length; i++) {
          var e = this.events[i]
          if (ctx.isPointInPath && ctx.isPointInPath(e.x, e.y)) {
            this.eventElements[i] = element
          }
        }
      }

      this.checkBoundingBox = function (element, bb) {
        for (var i = 0; i < this.events.length; i++) {
          var e = this.events[i]
          if (bb.isPointInBox(e.x, e.y)) this.eventElements[i] = element
        }
      }

      this.runEvents = function () {
        svg.ctx.canvas.style.cursor = ''

        for (var i = 0; i < this.events.length; i++) {
          var e = this.events[i]
          var element = this.eventElements[i]
          while (element) {
            e.run(element)
            element = element.parent
          }
        }

        // done running, clear
        this.events = []
        this.eventElements = []
      }
    }()

    return svg
  }
})()

if (typeof CanvasRenderingContext2D !== 'undefined') {
  CanvasRenderingContext2D.prototype.drawSvg = function (s, dx, dy, dw, dh) {
    canvg(this.canvas, s, {
      ignoreMouse: true,
      ignoreAnimation: true,
      ignoreDimensions: true,
      ignoreClear: true,
      offsetX: dx,
      offsetY: dy,
      scaleWidth: dw,
      scaleHeight: dh
    })
  }
}
